How to return TRUE if matrix contains any NAs?

6
votes

I wish query a matrix object and return a simple TRUE/FALSE answer if a matrix contains any NAs. So, if there are no NAs present you would get FALSE.

is.na(my.matrix) will tell me element-by-element if NAs are present, but I don't know how to sum up the results into a single answer. na.fail() looks like a better bet, but I'm still not sure how to extract a straightforward TRUE/FALSE answer.

2
rmatrixna
any(is.na(my.matrix))? – A5C1D2H2I1M1N2O1R2T1

2 Answers

7
votes

As Ananda Mahto pointed out, any(is.na(my.matrix)) does the trick.

5
votes

If you want to find the number of occurrences of NA then try sum(is.na(my.matrix)).