Hi, Is there a way of using is.infinite as is.na ? I'd like to avoid looping the data.frame. > mat x y z 1 1 Inf NA 2 2 Inf NA 3 3 Inf NA > is.na(mat) x y z 1 FALSE FALSE TRUE 2 FALSE FALSE TRUE 3 FALSE FALSE TRUE What I get at the moment is > is.infinite(mat) x y z FALSE FALSE FALSE Thanks EJ