Condense Column Values of a Data Frame in R Programming – summarise() Function

• Last Updated : 19 Jun, 2020

summarise() function in R Language is used to condense various values of column of a data frame to one value.

Syntax: summarise(x, expr)

Parameters:
x: Data Frame
expr: Operation to condense data

Example 1:

 # R program to condense data# of a data frame  # Loading library library(dplyr)    # Create a data framed <- data.frame( name = c("Abhi", "Bhavesh", "Chaman", "Dimri"),                   age = c(7, 5, 9, 16),                   ht = c(46, NA, NA, 69),                  school = c("yes", "yes", "no", "no") )   # Calculating min age summarise(d, min_age = min(age))     # Calculating max age summarise(d, max_age = max(age))

Output:

min_age
1       5
max_age
1      16

Example 2:

 # R program to condense data# of a data frame  # Loading library library(dplyr)    # Create a data framed <- data.frame( name = c("Abhi", "Bhavesh", "Chaman", "Dimri"),                   age = c(7, 5, 9, 16),                   ht = c(46, NA, NA, 69),                  school = c("yes", "yes", "no", "no") )   # Calculating mean of age summarise(d, mean = mean(age))   # Calculating median of age summarise(d, med = median(age))

Output:

mean
1 9.25
med
1   8

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