Condense Column Values of a Data Frame in R Programming – summarise() Function
Last Updated :
19 Jun, 2020
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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 frame d <- 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 frame d <- 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
