R programming tutorial: Using summarise() function of dplyr to get summary information

summarise(), summarise_all(), sumarise_at() from dplyr package in R provide convenient ways to get summary information by one or more variables. You can pass a data frame to summarise() , or passed to the grouped variable first, then assign a function n() inside summarise to get how many observation for each category. You can get statistical results like mean, standard deviation, for the specified column, by using summarise_at(), or for all columns of data frame by using summarise_all(). #rprogramming #datascience #rstudio #summarise #dplyr #tidyverse #rdatacode