Filter Out the Cases from an Object in R Programming - filter() Function Last Updated : 19 Jun, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report filter() function in R Language is used to choose cases and filtering out the values based on the filtering expression. Syntax: filter(x, expr) Parameters: x: Object to be filtered expr: expression as a base for filtering Example 1: Python3 1== # R Program to filter cases # Loading library library(dplyr) # Create a data frame with missing data 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") ) d # Finding rows with NA value filter(d, is.na(ht)) # Finding rows with no NA value filter(d, ! is.na(ht)) Output: name age ht school 1 Abhi 7 46 yes 2 Bhavesh 5 NA yes 3 Chaman 9 NA no 4 Dimri 16 69 no name age ht school 1 Bhavesh 5 NA yes 2 Chaman 9 NA no name age ht school 1 Abhi 7 46 yes 2 Dimri 16 69 no Example 2: Python3 1== # R Program to filter cases # 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", "no", "yes", "no") ) d # Finding rows with school filter(d, school == "yes") # Finding rows with no school filter(d, school == "no") Output: name age ht school 1 Abhi 7 46 yes 2 Bhavesh 5 NA no 3 Chaman 9 NA yes 4 Dimri 16 69 no name age ht school 1 Abhi 7 46 yes 2 Chaman 9 NA yes name age ht school 1 Bhavesh 5 NA no 2 Dimri 16 69 no Comment More infoAdvertise with us N nidhi_biet Follow Improve Article Tags : R Language R Object-Function Similar Reads R Tutorial | Learn R Programming Language R is an interpreted programming language widely used for statistical computing, data analysis and visualization. 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