How can I create visualizations using ggplot2 in R?

How can I create visualizations using ggplot2 in R?

You can create visualizations in ggplot2 by using the ggplot() function along with layers like geom_point(), geom_line(), etc.

Can you show me an example of a scatter plot?

Sure! Here's a simple example:

library(ggplot2)

data(mtcars)

ggplot(mtcars, aes(x=wt, y=mpg)) +
  geom_point() +
  labs(title='Scatter plot of Weight vs MPG')

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

What if I want to add a regression line?

You can add a regression line using geom_smooth(method='lm'). Here's how:

ggplot(mtcars, aes(x=wt, y=mpg)) +
  geom_point() +
  geom_smooth(method='lm', se=FALSE) +
  labs(title='Scatter plot with Regression Line')

How do I customize the colors of the points?

You can customize colors by adding the color aesthetic in aes(). For example:

ggplot(mtcars, aes(x=wt, y=mpg, color=factor(cyl))) +
  geom_point() +
  labs(title='Scatter plot with Custom Colors')