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:
# 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))
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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:
# 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" )
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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
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