replace na value in column r code example

Example 1: replace na with 0 in R

library(dplyr)
#Replacing missing values with 0 in columns 'x' and 'y' of the tibble dataframe 'df'
df %>% 
  replace_na(list(x = 0, y = 0))

Example 2: replace any NA in a data frame in r

a = data.frame(a=c(NA,1,2,NA), b=c(1,1,2,NA),c=c(NA,NA,2,NA))
for (i in 1:3){
  a[which(is.na(a[,i])),i] = 0
}