Hello R lovers I have written a little cute function to count the number of missing value per row in a matrix and return the percentage of missing value
it takes a lot of time to run with a 1000 rows matrix
I'd like to know if there is a function already implemented to count the number of occurence of a given values in a vector
For information, here is the function count<-0 for (i in 1:nrow(Matrix)) { for (j in 1:ncol(Matrix)) {if (is.na(Matrix[i,j])) count<-count+1} Result[i,1]<-((count/(ncol(Matrix)))*100); count<-0 } Result
thanks for any help Vincent
Well, it's pretty easy to do it:
apply(Matrix, 1, function(x) sum(is.na(x))) / ncol(Matrix) * 100
Uwe Ligges
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