How to Select the First Row by Group Using dplyr in R
To select the first row in each group using the dplyr package in R, you can “combine group_by(), arrange(), and filter()” functions. Syntax df %>% group_by(group_variable) %>% arrange(values_variable) %>% filter(row_number()==1) Example 1: Select the First Row by Group in R library(dplyr) df <- data.frame( Age = c(20, 21, 19, 22, 23, 20, 21), Gender = c(“Male”, “Female”, “Male”, … Read more