Re: [R] How to test if something doesn't exist

Joe Testing is something _exists_ is different than testing if something has what you are referring to as a valid value. Here is one way to do what I think you are doing versus testing if something exists validVal <- function(x, val){ if (!is.numeric(x)) stop('Not a numeric variable')

Re: [R] How to test if something doesn't exist

" if(any(blah=="xyz")) blah else as.numeric(factor(blah)) #[1] 1 2 3 4 5 A.K. ----- Original Message ----- From: Joseph Trubisz To: arun Cc: Sent: Wednesday, May 22, 2013 2:37 PM Subject: Re: [R] How to test if something doesn't exist OK...got it...thanks Joe On M

Re: [R] How to test if something doesn't exist

Hi Joe, Not sure about your expected result  blah<- paste0("x",1:5)  which(blah=="xyz") #integer(0) blah=="xyz" #[1] FALSE FALSE FALSE FALSE FALSE  any(blah=="xyz") #[1] FALSE  sum(blah=="xyz") #[1] 0 sum(blah=="x1") #[1] 1 A.K. - Original Message - From: Joseph Trubisz To: r-help@r-p