diff --git a/bloxplot.jpg b/bloxplot.jpg
new file mode 100644
index 0000000..c494f90
Binary files /dev/null and b/bloxplot.jpg differ
diff --git a/main.R b/main.R
index 585b12c..00b7a81 100644
--- a/main.R
+++ b/main.R
@@ -3,18 +3,18 @@ library(palmerpenguins) # install.packages("palmerpenguins")
 library(ggthemes)
 
 penguins
-
+view(penguins)
 ? penguins
 
 # ggplot
 ggplot(data = penguins, 
-       mapping = aes(x=flipper_len, y=body_mass, colour = species)) +
+       mapping = aes(x=flipper_length_mm, y=body_mass_g, colour = species)) +
   geom_point() + 
   geom_smooth(method = "lm")
 
 # ggplot step 2:
 ggplot(data = penguins, 
-       mapping = aes(x=flipper_len, y=body_mass)) +
+       mapping = aes(x=flipper_length_mm, y=body_mass_g)) +
   geom_point(mapping = aes(colour = species, shape = species)) + 
   geom_smooth(method = "lm")
 
@@ -22,7 +22,7 @@ ggplot(data = penguins,
 # ggplot final step:
 ggplot(
   data = penguins,
-  mapping = aes(x = flipper_len, y = body_mass)) +
+  mapping = aes(x = flipper_length_mm, y = body_mass_g)) +
   geom_point(aes(color = species, shape = species), size = 3.5) +
   geom_smooth(method = "lm") +
   labs(
@@ -50,5 +50,47 @@ ggplot(data = penguins,
 
 
 ggplot(data = penguins,
-       mapping = aes(x = body_mass)) +
+       mapping = aes(x = body_mass_g)) +
   geom_histogram(binwidth = 350)
+
+ggplot(penguins, aes(x = body_mass_g)) +
+  geom_density()
+
+
+# numerical and categorical
+
+ggplot(penguins, aes(x = species, y = body_mass_g)) +
+  geom_boxplot()
+
+# geom density
+ggplot(penguins, aes(x = body_mass_g, color = species)) +
+  geom_density(linewidth = 0.75)
+
+
+ggplot(penguins, aes(x = body_mass_g, color = species, fill = species)) +
+  geom_density(alpha = 0.5)
+
+# 1.5.2 Two categorical variables
+ggplot(penguins, aes(x = island, fill = species)) +
+  geom_bar()
+
+ggplot(penguins, aes(x = island, fill = species)) +
+  geom_bar(position = "fill")
+
+# Two numerical variables
+ggplot(penguins, aes(x = flipper_length_mm, y = body_mass_g)) +
+  geom_point()
+
+# Three or more variables
+ggplot(penguins, aes(x = flipper_length_mm, y = body_mass_g)) +
+  geom_point(aes(color = species, shape = island), size=3.5)
+
+ggplot(penguins, aes(x = flipper_length_mm, y = body_mass_g)) +
+  geom_point(aes(color = species, shape = species)) +
+  facet_wrap(~island)
+
+ggplot(penguins, aes(x = flipper_length_mm, y = body_mass_g)) +
+  geom_point()
+
+setwd("~/lwc/courses/data-science/data-visualization")
+ggsave(filename = "penguin-plot.png")
diff --git a/penguin-plot.png b/penguin-plot.png
new file mode 100644
index 0000000..7c1273c
Binary files /dev/null and b/penguin-plot.png differ