How do I prepare my data for ggplot in R?

How do I prepare my data for ggplot in R?

To prepare your data for ggplot, ensure it's in a tidy format, where each variable is a column and each observation is a row.

What if my data is in a wide format?

You can use the pivot_longer() function from the tidyr package to convert wide data to long format.

Can you give me an example of using pivot_longer?

Sure! If you have a data frame with columns for 'year', 'sales_A', and 'sales_B', you can do:

library(tidyr)
long_data <- pivot_longer(data, cols = starts_with('sales'), names_to = 'product', values_to = 'sales')

What should I do after transforming the data?

After transforming, you can create your ggplot visualizations using the long format data. Just map your aesthetics accordingly!