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789 lines
29 KiB
Python
789 lines
29 KiB
Python
r"""
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:mod:`~matplotlib.gridspec` contains classes that help to layout multiple
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`~.axes.Axes` in a grid-like pattern within a figure.
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The `GridSpec` specifies the overall grid structure. Individual cells within
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the grid are referenced by `SubplotSpec`\s.
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Often, users need not access this module directly, and can use higher-level
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methods like `~.pyplot.subplots`, `~.pyplot.subplot_mosaic` and
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`~.Figure.subfigures`. See the tutorial :ref:`arranging_axes` for a guide.
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"""
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import copy
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import logging
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from numbers import Integral
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import numpy as np
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import matplotlib as mpl
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from matplotlib import _api, _pylab_helpers, _tight_layout
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from matplotlib.transforms import Bbox
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_log = logging.getLogger(__name__)
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class GridSpecBase:
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"""
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A base class of GridSpec that specifies the geometry of the grid
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that a subplot will be placed.
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"""
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def __init__(self, nrows, ncols, height_ratios=None, width_ratios=None):
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"""
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Parameters
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----------
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nrows, ncols : int
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The number of rows and columns of the grid.
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width_ratios : array-like of length *ncols*, optional
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Defines the relative widths of the columns. Each column gets a
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relative width of ``width_ratios[i] / sum(width_ratios)``.
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If not given, all columns will have the same width.
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height_ratios : array-like of length *nrows*, optional
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Defines the relative heights of the rows. Each row gets a
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relative height of ``height_ratios[i] / sum(height_ratios)``.
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If not given, all rows will have the same height.
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"""
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if not isinstance(nrows, Integral) or nrows <= 0:
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raise ValueError(
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f"Number of rows must be a positive integer, not {nrows!r}")
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if not isinstance(ncols, Integral) or ncols <= 0:
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raise ValueError(
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f"Number of columns must be a positive integer, not {ncols!r}")
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self._nrows, self._ncols = nrows, ncols
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self.set_height_ratios(height_ratios)
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self.set_width_ratios(width_ratios)
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def __repr__(self):
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height_arg = (f', height_ratios={self._row_height_ratios!r}'
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if len(set(self._row_height_ratios)) != 1 else '')
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width_arg = (f', width_ratios={self._col_width_ratios!r}'
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if len(set(self._col_width_ratios)) != 1 else '')
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return '{clsname}({nrows}, {ncols}{optionals})'.format(
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clsname=self.__class__.__name__,
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nrows=self._nrows,
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ncols=self._ncols,
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optionals=height_arg + width_arg,
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)
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nrows = property(lambda self: self._nrows,
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doc="The number of rows in the grid.")
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ncols = property(lambda self: self._ncols,
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doc="The number of columns in the grid.")
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def get_geometry(self):
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"""
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Return a tuple containing the number of rows and columns in the grid.
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"""
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return self._nrows, self._ncols
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def get_subplot_params(self, figure=None):
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# Must be implemented in subclasses
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pass
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def new_subplotspec(self, loc, rowspan=1, colspan=1):
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"""
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Create and return a `.SubplotSpec` instance.
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Parameters
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----------
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loc : (int, int)
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The position of the subplot in the grid as
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``(row_index, column_index)``.
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rowspan, colspan : int, default: 1
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The number of rows and columns the subplot should span in the grid.
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"""
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loc1, loc2 = loc
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subplotspec = self[loc1:loc1+rowspan, loc2:loc2+colspan]
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return subplotspec
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def set_width_ratios(self, width_ratios):
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"""
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Set the relative widths of the columns.
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*width_ratios* must be of length *ncols*. Each column gets a relative
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width of ``width_ratios[i] / sum(width_ratios)``.
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"""
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if width_ratios is None:
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width_ratios = [1] * self._ncols
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elif len(width_ratios) != self._ncols:
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raise ValueError('Expected the given number of width ratios to '
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'match the number of columns of the grid')
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self._col_width_ratios = width_ratios
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def get_width_ratios(self):
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"""
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Return the width ratios.
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This is *None* if no width ratios have been set explicitly.
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"""
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return self._col_width_ratios
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def set_height_ratios(self, height_ratios):
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"""
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Set the relative heights of the rows.
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*height_ratios* must be of length *nrows*. Each row gets a relative
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height of ``height_ratios[i] / sum(height_ratios)``.
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"""
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if height_ratios is None:
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height_ratios = [1] * self._nrows
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elif len(height_ratios) != self._nrows:
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raise ValueError('Expected the given number of height ratios to '
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'match the number of rows of the grid')
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self._row_height_ratios = height_ratios
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def get_height_ratios(self):
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"""
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Return the height ratios.
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This is *None* if no height ratios have been set explicitly.
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"""
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return self._row_height_ratios
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def get_grid_positions(self, fig):
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"""
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Return the positions of the grid cells in figure coordinates.
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Parameters
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----------
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fig : `~matplotlib.figure.Figure`
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The figure the grid should be applied to. The subplot parameters
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(margins and spacing between subplots) are taken from *fig*.
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Returns
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-------
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bottoms, tops, lefts, rights : array
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The bottom, top, left, right positions of the grid cells in
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figure coordinates.
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"""
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nrows, ncols = self.get_geometry()
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subplot_params = self.get_subplot_params(fig)
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left = subplot_params.left
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right = subplot_params.right
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bottom = subplot_params.bottom
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top = subplot_params.top
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wspace = subplot_params.wspace
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hspace = subplot_params.hspace
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tot_width = right - left
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tot_height = top - bottom
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# calculate accumulated heights of columns
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cell_h = tot_height / (nrows + hspace*(nrows-1))
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sep_h = hspace * cell_h
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norm = cell_h * nrows / sum(self._row_height_ratios)
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cell_heights = [r * norm for r in self._row_height_ratios]
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sep_heights = [0] + ([sep_h] * (nrows-1))
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cell_hs = np.cumsum(np.column_stack([sep_heights, cell_heights]).flat)
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# calculate accumulated widths of rows
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cell_w = tot_width / (ncols + wspace*(ncols-1))
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sep_w = wspace * cell_w
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norm = cell_w * ncols / sum(self._col_width_ratios)
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cell_widths = [r * norm for r in self._col_width_ratios]
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sep_widths = [0] + ([sep_w] * (ncols-1))
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cell_ws = np.cumsum(np.column_stack([sep_widths, cell_widths]).flat)
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fig_tops, fig_bottoms = (top - cell_hs).reshape((-1, 2)).T
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fig_lefts, fig_rights = (left + cell_ws).reshape((-1, 2)).T
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return fig_bottoms, fig_tops, fig_lefts, fig_rights
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@staticmethod
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def _check_gridspec_exists(figure, nrows, ncols):
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"""
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Check if the figure already has a gridspec with these dimensions,
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or create a new one
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"""
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for ax in figure.get_axes():
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gs = ax.get_gridspec()
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if gs is not None:
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if hasattr(gs, 'get_topmost_subplotspec'):
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# This is needed for colorbar gridspec layouts.
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# This is probably OK because this whole logic tree
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# is for when the user is doing simple things with the
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# add_subplot command. For complicated layouts
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# like subgridspecs the proper gridspec is passed in...
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gs = gs.get_topmost_subplotspec().get_gridspec()
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if gs.get_geometry() == (nrows, ncols):
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return gs
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# else gridspec not found:
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return GridSpec(nrows, ncols, figure=figure)
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def __getitem__(self, key):
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"""Create and return a `.SubplotSpec` instance."""
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nrows, ncols = self.get_geometry()
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def _normalize(key, size, axis): # Includes last index.
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orig_key = key
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if isinstance(key, slice):
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start, stop, _ = key.indices(size)
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if stop > start:
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return start, stop - 1
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raise IndexError("GridSpec slice would result in no space "
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"allocated for subplot")
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else:
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if key < 0:
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key = key + size
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if 0 <= key < size:
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return key, key
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elif axis is not None:
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raise IndexError(f"index {orig_key} is out of bounds for "
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f"axis {axis} with size {size}")
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else: # flat index
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raise IndexError(f"index {orig_key} is out of bounds for "
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f"GridSpec with size {size}")
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if isinstance(key, tuple):
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try:
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k1, k2 = key
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except ValueError as err:
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raise ValueError("Unrecognized subplot spec") from err
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num1, num2 = np.ravel_multi_index(
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[_normalize(k1, nrows, 0), _normalize(k2, ncols, 1)],
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(nrows, ncols))
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else: # Single key
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num1, num2 = _normalize(key, nrows * ncols, None)
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return SubplotSpec(self, num1, num2)
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def subplots(self, *, sharex=False, sharey=False, squeeze=True,
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subplot_kw=None):
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"""
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Add all subplots specified by this `GridSpec` to its parent figure.
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See `.Figure.subplots` for detailed documentation.
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"""
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figure = self.figure
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if figure is None:
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raise ValueError("GridSpec.subplots() only works for GridSpecs "
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"created with a parent figure")
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if not isinstance(sharex, str):
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sharex = "all" if sharex else "none"
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if not isinstance(sharey, str):
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sharey = "all" if sharey else "none"
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_api.check_in_list(["all", "row", "col", "none", False, True],
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sharex=sharex, sharey=sharey)
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if subplot_kw is None:
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subplot_kw = {}
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# don't mutate kwargs passed by user...
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subplot_kw = subplot_kw.copy()
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# Create array to hold all Axes.
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axarr = np.empty((self._nrows, self._ncols), dtype=object)
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for row in range(self._nrows):
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for col in range(self._ncols):
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shared_with = {"none": None, "all": axarr[0, 0],
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"row": axarr[row, 0], "col": axarr[0, col]}
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subplot_kw["sharex"] = shared_with[sharex]
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subplot_kw["sharey"] = shared_with[sharey]
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axarr[row, col] = figure.add_subplot(
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self[row, col], **subplot_kw)
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# turn off redundant tick labeling
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if sharex in ["col", "all"]:
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for ax in axarr.flat:
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ax._label_outer_xaxis(skip_non_rectangular_axes=True)
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if sharey in ["row", "all"]:
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for ax in axarr.flat:
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ax._label_outer_yaxis(skip_non_rectangular_axes=True)
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if squeeze:
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# Discarding unneeded dimensions that equal 1. If we only have one
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# subplot, just return it instead of a 1-element array.
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return axarr.item() if axarr.size == 1 else axarr.squeeze()
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else:
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# Returned axis array will be always 2-d, even if nrows=ncols=1.
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return axarr
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|
|
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class GridSpec(GridSpecBase):
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"""
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A grid layout to place subplots within a figure.
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The location of the grid cells is determined in a similar way to
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`.SubplotParams` using *left*, *right*, *top*, *bottom*, *wspace*
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and *hspace*.
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Indexing a GridSpec instance returns a `.SubplotSpec`.
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"""
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def __init__(self, nrows, ncols, figure=None,
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left=None, bottom=None, right=None, top=None,
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wspace=None, hspace=None,
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width_ratios=None, height_ratios=None):
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"""
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Parameters
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----------
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nrows, ncols : int
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The number of rows and columns of the grid.
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figure : `.Figure`, optional
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Only used for constrained layout to create a proper layoutgrid.
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left, right, top, bottom : float, optional
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Extent of the subplots as a fraction of figure width or height.
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Left cannot be larger than right, and bottom cannot be larger than
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top. If not given, the values will be inferred from a figure or
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rcParams at draw time. See also `GridSpec.get_subplot_params`.
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wspace : float, optional
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The amount of width reserved for space between subplots,
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expressed as a fraction of the average axis width.
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If not given, the values will be inferred from a figure or
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rcParams when necessary. See also `GridSpec.get_subplot_params`.
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hspace : float, optional
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The amount of height reserved for space between subplots,
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expressed as a fraction of the average axis height.
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If not given, the values will be inferred from a figure or
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rcParams when necessary. See also `GridSpec.get_subplot_params`.
|
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width_ratios : array-like of length *ncols*, optional
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Defines the relative widths of the columns. Each column gets a
|
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relative width of ``width_ratios[i] / sum(width_ratios)``.
|
|
If not given, all columns will have the same width.
|
|
|
|
height_ratios : array-like of length *nrows*, optional
|
|
Defines the relative heights of the rows. Each row gets a
|
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relative height of ``height_ratios[i] / sum(height_ratios)``.
|
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If not given, all rows will have the same height.
|
|
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"""
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self.left = left
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self.bottom = bottom
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self.right = right
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self.top = top
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self.wspace = wspace
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self.hspace = hspace
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self.figure = figure
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super().__init__(nrows, ncols,
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width_ratios=width_ratios,
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height_ratios=height_ratios)
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_AllowedKeys = ["left", "bottom", "right", "top", "wspace", "hspace"]
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def update(self, **kwargs):
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"""
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Update the subplot parameters of the grid.
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|
Parameters that are not explicitly given are not changed. Setting a
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parameter to *None* resets it to :rc:`figure.subplot.*`.
|
|
|
|
Parameters
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----------
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left, right, top, bottom : float or None, optional
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Extent of the subplots as a fraction of figure width or height.
|
|
wspace, hspace : float, optional
|
|
Spacing between the subplots as a fraction of the average subplot
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width / height.
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|
"""
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for k, v in kwargs.items():
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if k in self._AllowedKeys:
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setattr(self, k, v)
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else:
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raise AttributeError(f"{k} is an unknown keyword")
|
|
for figmanager in _pylab_helpers.Gcf.figs.values():
|
|
for ax in figmanager.canvas.figure.axes:
|
|
if ax.get_subplotspec() is not None:
|
|
ss = ax.get_subplotspec().get_topmost_subplotspec()
|
|
if ss.get_gridspec() == self:
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|
fig = ax.get_figure(root=False)
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ax._set_position(ax.get_subplotspec().get_position(fig))
|
|
|
|
def get_subplot_params(self, figure=None):
|
|
"""
|
|
Return the `.SubplotParams` for the GridSpec.
|
|
|
|
In order of precedence the values are taken from
|
|
|
|
- non-*None* attributes of the GridSpec
|
|
- the provided *figure*
|
|
- :rc:`figure.subplot.*`
|
|
|
|
Note that the ``figure`` attribute of the GridSpec is always ignored.
|
|
"""
|
|
if figure is None:
|
|
kw = {k: mpl.rcParams["figure.subplot."+k]
|
|
for k in self._AllowedKeys}
|
|
subplotpars = SubplotParams(**kw)
|
|
else:
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|
subplotpars = copy.copy(figure.subplotpars)
|
|
|
|
subplotpars.update(**{k: getattr(self, k) for k in self._AllowedKeys})
|
|
|
|
return subplotpars
|
|
|
|
def locally_modified_subplot_params(self):
|
|
"""
|
|
Return a list of the names of the subplot parameters explicitly set
|
|
in the GridSpec.
|
|
|
|
This is a subset of the attributes of `.SubplotParams`.
|
|
"""
|
|
return [k for k in self._AllowedKeys if getattr(self, k)]
|
|
|
|
def tight_layout(self, figure, renderer=None,
|
|
pad=1.08, h_pad=None, w_pad=None, rect=None):
|
|
"""
|
|
Adjust subplot parameters to give specified padding.
|
|
|
|
Parameters
|
|
----------
|
|
figure : `.Figure`
|
|
The figure.
|
|
renderer : `.RendererBase` subclass, optional
|
|
The renderer to be used.
|
|
pad : float
|
|
Padding between the figure edge and the edges of subplots, as a
|
|
fraction of the font-size.
|
|
h_pad, w_pad : float, optional
|
|
Padding (height/width) between edges of adjacent subplots.
|
|
Defaults to *pad*.
|
|
rect : tuple (left, bottom, right, top), default: None
|
|
(left, bottom, right, top) rectangle in normalized figure
|
|
coordinates that the whole subplots area (including labels) will
|
|
fit into. Default (None) is the whole figure.
|
|
"""
|
|
if renderer is None:
|
|
renderer = figure._get_renderer()
|
|
kwargs = _tight_layout.get_tight_layout_figure(
|
|
figure, figure.axes,
|
|
_tight_layout.get_subplotspec_list(figure.axes, grid_spec=self),
|
|
renderer, pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
|
|
if kwargs:
|
|
self.update(**kwargs)
|
|
|
|
|
|
class GridSpecFromSubplotSpec(GridSpecBase):
|
|
"""
|
|
GridSpec whose subplot layout parameters are inherited from the
|
|
location specified by a given SubplotSpec.
|
|
"""
|
|
def __init__(self, nrows, ncols,
|
|
subplot_spec,
|
|
wspace=None, hspace=None,
|
|
height_ratios=None, width_ratios=None):
|
|
"""
|
|
Parameters
|
|
----------
|
|
nrows, ncols : int
|
|
Number of rows and number of columns of the grid.
|
|
subplot_spec : SubplotSpec
|
|
Spec from which the layout parameters are inherited.
|
|
wspace, hspace : float, optional
|
|
See `GridSpec` for more details. If not specified default values
|
|
(from the figure or rcParams) are used.
|
|
height_ratios : array-like of length *nrows*, optional
|
|
See `GridSpecBase` for details.
|
|
width_ratios : array-like of length *ncols*, optional
|
|
See `GridSpecBase` for details.
|
|
"""
|
|
self._wspace = wspace
|
|
self._hspace = hspace
|
|
if isinstance(subplot_spec, SubplotSpec):
|
|
self._subplot_spec = subplot_spec
|
|
else:
|
|
raise TypeError(
|
|
"subplot_spec must be type SubplotSpec, "
|
|
"usually from GridSpec, or axes.get_subplotspec.")
|
|
self.figure = self._subplot_spec.get_gridspec().figure
|
|
super().__init__(nrows, ncols,
|
|
width_ratios=width_ratios,
|
|
height_ratios=height_ratios)
|
|
|
|
def get_subplot_params(self, figure=None):
|
|
"""Return a dictionary of subplot layout parameters."""
|
|
hspace = (self._hspace if self._hspace is not None
|
|
else figure.subplotpars.hspace if figure is not None
|
|
else mpl.rcParams["figure.subplot.hspace"])
|
|
wspace = (self._wspace if self._wspace is not None
|
|
else figure.subplotpars.wspace if figure is not None
|
|
else mpl.rcParams["figure.subplot.wspace"])
|
|
|
|
figbox = self._subplot_spec.get_position(figure)
|
|
left, bottom, right, top = figbox.extents
|
|
|
|
return SubplotParams(left=left, right=right,
|
|
bottom=bottom, top=top,
|
|
wspace=wspace, hspace=hspace)
|
|
|
|
def get_topmost_subplotspec(self):
|
|
"""
|
|
Return the topmost `.SubplotSpec` instance associated with the subplot.
|
|
"""
|
|
return self._subplot_spec.get_topmost_subplotspec()
|
|
|
|
|
|
class SubplotSpec:
|
|
"""
|
|
The location of a subplot in a `GridSpec`.
|
|
|
|
.. note::
|
|
|
|
Likely, you will never instantiate a `SubplotSpec` yourself. Instead,
|
|
you will typically obtain one from a `GridSpec` using item-access.
|
|
|
|
Parameters
|
|
----------
|
|
gridspec : `~matplotlib.gridspec.GridSpec`
|
|
The GridSpec, which the subplot is referencing.
|
|
num1, num2 : int
|
|
The subplot will occupy the *num1*-th cell of the given
|
|
*gridspec*. If *num2* is provided, the subplot will span between
|
|
*num1*-th cell and *num2*-th cell **inclusive**.
|
|
|
|
The index starts from 0.
|
|
"""
|
|
def __init__(self, gridspec, num1, num2=None):
|
|
self._gridspec = gridspec
|
|
self.num1 = num1
|
|
self.num2 = num2
|
|
|
|
def __repr__(self):
|
|
return (f"{self.get_gridspec()}["
|
|
f"{self.rowspan.start}:{self.rowspan.stop}, "
|
|
f"{self.colspan.start}:{self.colspan.stop}]")
|
|
|
|
@staticmethod
|
|
def _from_subplot_args(figure, args):
|
|
"""
|
|
Construct a `.SubplotSpec` from a parent `.Figure` and either
|
|
|
|
- a `.SubplotSpec` -- returned as is;
|
|
- one or three numbers -- a MATLAB-style subplot specifier.
|
|
"""
|
|
if len(args) == 1:
|
|
arg, = args
|
|
if isinstance(arg, SubplotSpec):
|
|
return arg
|
|
elif not isinstance(arg, Integral):
|
|
raise ValueError(
|
|
f"Single argument to subplot must be a three-digit "
|
|
f"integer, not {arg!r}")
|
|
try:
|
|
rows, cols, num = map(int, str(arg))
|
|
except ValueError:
|
|
raise ValueError(
|
|
f"Single argument to subplot must be a three-digit "
|
|
f"integer, not {arg!r}") from None
|
|
elif len(args) == 3:
|
|
rows, cols, num = args
|
|
else:
|
|
raise _api.nargs_error("subplot", takes="1 or 3", given=len(args))
|
|
|
|
gs = GridSpec._check_gridspec_exists(figure, rows, cols)
|
|
if gs is None:
|
|
gs = GridSpec(rows, cols, figure=figure)
|
|
if isinstance(num, tuple) and len(num) == 2:
|
|
if not all(isinstance(n, Integral) for n in num):
|
|
raise ValueError(
|
|
f"Subplot specifier tuple must contain integers, not {num}"
|
|
)
|
|
i, j = num
|
|
else:
|
|
if not isinstance(num, Integral) or num < 1 or num > rows*cols:
|
|
raise ValueError(
|
|
f"num must be an integer with 1 <= num <= {rows*cols}, "
|
|
f"not {num!r}"
|
|
)
|
|
i = j = num
|
|
return gs[i-1:j]
|
|
|
|
# num2 is a property only to handle the case where it is None and someone
|
|
# mutates num1.
|
|
|
|
@property
|
|
def num2(self):
|
|
return self.num1 if self._num2 is None else self._num2
|
|
|
|
@num2.setter
|
|
def num2(self, value):
|
|
self._num2 = value
|
|
|
|
def get_gridspec(self):
|
|
return self._gridspec
|
|
|
|
def get_geometry(self):
|
|
"""
|
|
Return the subplot geometry as tuple ``(n_rows, n_cols, start, stop)``.
|
|
|
|
The indices *start* and *stop* define the range of the subplot within
|
|
the `GridSpec`. *stop* is inclusive (i.e. for a single cell
|
|
``start == stop``).
|
|
"""
|
|
rows, cols = self.get_gridspec().get_geometry()
|
|
return rows, cols, self.num1, self.num2
|
|
|
|
@property
|
|
def rowspan(self):
|
|
"""The rows spanned by this subplot, as a `range` object."""
|
|
ncols = self.get_gridspec().ncols
|
|
return range(self.num1 // ncols, self.num2 // ncols + 1)
|
|
|
|
@property
|
|
def colspan(self):
|
|
"""The columns spanned by this subplot, as a `range` object."""
|
|
ncols = self.get_gridspec().ncols
|
|
# We explicitly support num2 referring to a column on num1's *left*, so
|
|
# we must sort the column indices here so that the range makes sense.
|
|
c1, c2 = sorted([self.num1 % ncols, self.num2 % ncols])
|
|
return range(c1, c2 + 1)
|
|
|
|
def is_first_row(self):
|
|
return self.rowspan.start == 0
|
|
|
|
def is_last_row(self):
|
|
return self.rowspan.stop == self.get_gridspec().nrows
|
|
|
|
def is_first_col(self):
|
|
return self.colspan.start == 0
|
|
|
|
def is_last_col(self):
|
|
return self.colspan.stop == self.get_gridspec().ncols
|
|
|
|
def get_position(self, figure):
|
|
"""
|
|
Update the subplot position from ``figure.subplotpars``.
|
|
"""
|
|
gridspec = self.get_gridspec()
|
|
nrows, ncols = gridspec.get_geometry()
|
|
rows, cols = np.unravel_index([self.num1, self.num2], (nrows, ncols))
|
|
fig_bottoms, fig_tops, fig_lefts, fig_rights = \
|
|
gridspec.get_grid_positions(figure)
|
|
|
|
fig_bottom = fig_bottoms[rows].min()
|
|
fig_top = fig_tops[rows].max()
|
|
fig_left = fig_lefts[cols].min()
|
|
fig_right = fig_rights[cols].max()
|
|
return Bbox.from_extents(fig_left, fig_bottom, fig_right, fig_top)
|
|
|
|
def get_topmost_subplotspec(self):
|
|
"""
|
|
Return the topmost `SubplotSpec` instance associated with the subplot.
|
|
"""
|
|
gridspec = self.get_gridspec()
|
|
if hasattr(gridspec, "get_topmost_subplotspec"):
|
|
return gridspec.get_topmost_subplotspec()
|
|
else:
|
|
return self
|
|
|
|
def __eq__(self, other):
|
|
"""
|
|
Two SubplotSpecs are considered equal if they refer to the same
|
|
position(s) in the same `GridSpec`.
|
|
"""
|
|
# other may not even have the attributes we are checking.
|
|
return ((self._gridspec, self.num1, self.num2)
|
|
== (getattr(other, "_gridspec", object()),
|
|
getattr(other, "num1", object()),
|
|
getattr(other, "num2", object())))
|
|
|
|
def __hash__(self):
|
|
return hash((self._gridspec, self.num1, self.num2))
|
|
|
|
def subgridspec(self, nrows, ncols, **kwargs):
|
|
"""
|
|
Create a GridSpec within this subplot.
|
|
|
|
The created `.GridSpecFromSubplotSpec` will have this `SubplotSpec` as
|
|
a parent.
|
|
|
|
Parameters
|
|
----------
|
|
nrows : int
|
|
Number of rows in grid.
|
|
|
|
ncols : int
|
|
Number of columns in grid.
|
|
|
|
Returns
|
|
-------
|
|
`.GridSpecFromSubplotSpec`
|
|
|
|
Other Parameters
|
|
----------------
|
|
**kwargs
|
|
All other parameters are passed to `.GridSpecFromSubplotSpec`.
|
|
|
|
See Also
|
|
--------
|
|
matplotlib.pyplot.subplots
|
|
|
|
Examples
|
|
--------
|
|
Adding three subplots in the space occupied by a single subplot::
|
|
|
|
fig = plt.figure()
|
|
gs0 = fig.add_gridspec(3, 1)
|
|
ax1 = fig.add_subplot(gs0[0])
|
|
ax2 = fig.add_subplot(gs0[1])
|
|
gssub = gs0[2].subgridspec(1, 3)
|
|
for i in range(3):
|
|
fig.add_subplot(gssub[0, i])
|
|
"""
|
|
return GridSpecFromSubplotSpec(nrows, ncols, self, **kwargs)
|
|
|
|
|
|
class SubplotParams:
|
|
"""
|
|
Parameters defining the positioning of a subplots grid in a figure.
|
|
"""
|
|
|
|
def __init__(self, left=None, bottom=None, right=None, top=None,
|
|
wspace=None, hspace=None):
|
|
"""
|
|
Defaults are given by :rc:`figure.subplot.[name]`.
|
|
|
|
Parameters
|
|
----------
|
|
left : float
|
|
The position of the left edge of the subplots,
|
|
as a fraction of the figure width.
|
|
right : float
|
|
The position of the right edge of the subplots,
|
|
as a fraction of the figure width.
|
|
bottom : float
|
|
The position of the bottom edge of the subplots,
|
|
as a fraction of the figure height.
|
|
top : float
|
|
The position of the top edge of the subplots,
|
|
as a fraction of the figure height.
|
|
wspace : float
|
|
The width of the padding between subplots,
|
|
as a fraction of the average Axes width.
|
|
hspace : float
|
|
The height of the padding between subplots,
|
|
as a fraction of the average Axes height.
|
|
"""
|
|
for key in ["left", "bottom", "right", "top", "wspace", "hspace"]:
|
|
setattr(self, key, mpl.rcParams[f"figure.subplot.{key}"])
|
|
self.update(left, bottom, right, top, wspace, hspace)
|
|
|
|
def update(self, left=None, bottom=None, right=None, top=None,
|
|
wspace=None, hspace=None):
|
|
"""
|
|
Update the dimensions of the passed parameters. *None* means unchanged.
|
|
"""
|
|
if ((left if left is not None else self.left)
|
|
>= (right if right is not None else self.right)):
|
|
raise ValueError('left cannot be >= right')
|
|
if ((bottom if bottom is not None else self.bottom)
|
|
>= (top if top is not None else self.top)):
|
|
raise ValueError('bottom cannot be >= top')
|
|
if left is not None:
|
|
self.left = left
|
|
if right is not None:
|
|
self.right = right
|
|
if bottom is not None:
|
|
self.bottom = bottom
|
|
if top is not None:
|
|
self.top = top
|
|
if wspace is not None:
|
|
self.wspace = wspace
|
|
if hspace is not None:
|
|
self.hspace = hspace
|