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How to find the percent of NA’s in R data frame rows?
To find the percent of NAs in each row of an R data frame, we can follow the below steps −
First of all, create a data frame.
Then, use rowSums function and ncol function along with apply function to find the percent of NAs in each row of the data frame
Example
Create the data frame
Let’s create a data frame as shown below −
v1<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v2<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v3<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v4<-sample(c(NA,rpois(3,2)),25,replace=TRUE) df<-data.frame(v1,v2,v3,v4) df
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
v1 v2 v3 v4 1 1 2 2 4 2 2 2 2 3 3 2 2 NA 3 4 2 1 4 NA 5 2 2 NA 1 6 NA NA 4 NA 7 2 2 4 NA 8 2 1 4 3 9 2 2 0 4 10 2 2 0 NA 11 NA 2 2 NA 12 2 2 0 4 13 1 2 4 1 14 1 NA 4 3 15 2 NA 4 NA 16 2 NA 4 3 17 2 NA NA 3 18 1 1 NA 4 19 NA 1 NA NA 20 NA 2 0 4 21 1 2 4 1 22 2 2 2 1 23 2 1 4 4 24 1 2 4 NA 25 NA NA NA 3
Find the percent of NAs in each row
Using rowSums function and ncol function along with apply function to find the percent of NAs in each row of the data frame df −
v1<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v2<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v3<-sample(c(NA,rpois(3,2)),25,replace=TRUE) v4<-sample(c(NA,rpois(3,2)),25,replace=TRUE) df<-data.frame(v1,v2,v3,v4) df$NA_Percent<-rowSums(apply(is.na(df),2,as.numeric))/ncol(df) df
Output
v1 v2 v3 v4 NA_Percent 1 1 2 2 4 0.00 2 2 2 2 3 0.00 3 2 2 NA 3 0.25 4 2 1 4 NA 0.25 5 2 2 NA 1 0.25 6 NA NA 4 NA 0.75 7 2 2 4 NA 0.25 8 2 1 4 3 0.00 9 2 2 0 4 0.00 10 2 2 0 NA 0.25 11 NA 2 2 NA 0.50 12 2 2 0 4 0.00 13 1 2 4 1 0.00 14 1 NA 4 3 0.25 15 2 NA 4 NA 0.50 16 2 NA 4 3 0.25 17 2 NA NA 3 0.50 18 1 1 NA 4 0.25 19 NA 1 NA NA 0.75 20 NA 2 0 4 0.25 21 1 2 4 1 0.00 22 2 2 2 1 0.00 23 2 1 4 4 0.00 24 1 2 4 NA 0.25 25 NA NA NA 3 0.75
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