How do I use geom functions in ggplot2?

How do I use geom functions in ggplot2?

In ggplot2, geom functions are used to add layers to your plots. For example, geom_point() adds points to a scatter plot.

Can you give me an example of a scatter plot using geom_point?

Sure! Here's a simple example:

library(ggplot2)

data(mtcars)

ggplot(mtcars, aes(x=wt, y=mpg)) +
  geom_point()  

This will create a scatter plot of weight vs. miles per gallon.

What other geom functions are available?

There are many! Some common ones include geom_line() for line plots, geom_bar() for bar charts, and geom_histogram() for histograms.

How can I customize the appearance of the points in my scatter plot?

You can customize the appearance using aesthetics like color, size, and shape. For example:

ggplot(mtcars, aes(x=wt, y=mpg, color=as.factor(cyl))) +
  geom_point(size=3, shape=21, fill='blue')