Add new Variables to a Data Frame using Existing Variables in R Programming – mutate() Function
mutate() function in R Language is used to add new variables in a data frame which are formed by performing operation on existing variables.
Syntax: mutate(x, expr)
Parameters:
x: Data Frame
expr: operation on variables
Example 1:
# R program to add new variables# in 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 a variable x3 which is sum of height # and age printing with ht and age mutate(d, x3 = ht + age) |
Output:
name age ht school x3
1 Abhi 7 46 yes 53
2 Bhavesh 5 NA yes NA
3 Chaman 9 NA no NA
4 Dimri 16 69 no 85
Example 2:
# R program to add new variables# in 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 a variable x3 which is product of height # and age printing with ht and age mutate(d, x3 = ht * age) |
Output:
name age ht school x3
1 Abhi 7 46 yes 322
2 Bhavesh 5 NA yes NA
3 Chaman 9 NA no NA
4 Dimri 16 69 no 1104
