find smallest number by group in r

To find the smallest number by group in R, we can use the group_by and summarize functions from the dplyr package:

main.r
library(dplyr)

data %>%
  group_by(group_var) %>%
  summarize(min_value = min(numeric_var))
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where data is the name of the dataset, group_var is the name of the variable used to group the data, and numeric_var is the name of the numerical variable for which we want to find the smallest value.

This code will group the data by the group_var variable and then calculate the minimum value of numeric_var within each group. The result will be a new dataset with two columns: group_var and min_value.