Prepares a by Group Bar Graph

Reads a data frame containing a grouping factor and a numerical variable and plots a bar graph of a given statistic of the variable by the grouping factor.

Usage

prepare_by_group_bar_graph(
  df,
  by_var,
  var,
  stat_fun = mean,
  order_by_stat = FALSE,
  color = "red"
)

Arguments

df

Data frame containing the grouping factor and the numerical variable to be plotted

by_var

a string containing the column name of the grouping factor

var

a string containing the column name of the numerical variable

stat_fun

a function to be called on the numerical variable. Will be called with na.rm = TRUE to ignore missing values

order_by_stat

a logical value indicating whether you want your bars to be ordered the value of the statistic (defaults to FALSE)

color

bar color

Value

A list containing two items:

"df"

A data frame containing the statistics by group

"plot"

The plot as returned by ggplot

Examples

data(russell_3000)
graph <- prepare_by_group_bar_graph(russell_3000, "sector", "ni_sales", median)
graph$plot