| hist_group | R Documentation | 
This function make a histogram categorized by grouping variable
hist_group(
  data,
  var,
  group,
  show.hist = T,
  show.density = T,
  show.mean = T,
  bins = 50,
  alpha = 0.5
)
| data | a dataframe to be used | 
| var | a numeric variable | 
| group | a grouping variable (factor) | 
| show.hist | a logical indicating whether to show histogram | 
| show.density | a logical indicating whether to show density plot | 
| show.mean | a logical indicating whether to show mean values | 
| bins | number of bins | 
| alpha | transparency of density plot | 
ggplot2 histogram
hist_group(mtcars, "mpg", "am")
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