plot histogram with ggplot with two independent variables in r

To plot a histogram with two independent variables in ggplot, you can use the facet_wrap() function to separate the two independent variables into separate panels. Here is an example code:

main.r
library(ggplot2)

# create dummy data
data <- data.frame(
  variable1 = rnorm(1000),
  variable2 = rnorm(1000)
)

# plot histogram with two independent variables
ggplot(data, aes(x = variable1)) +
  geom_histogram() +
  facet_wrap(~ variable2)
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In this example, we created a data frame with two columns (variable1 and variable2) that each contain 1000 random normal values. We then used ggplot() to specify the data frame and set variable1 as the x-axis variable. We added a histogram layer with geom_histogram(), which creates the histogram for variable1. Finally, we used facet_wrap(~ variable2) to create separate panels with histograms for each value of variable2.