Re: [R] Help with vectors and rollapply

Hi Bill Many thanks for your help. Cheers R -Original Message- From: William Dunlap [mailto:wdun...@tibco.com] Sent: 10 July 2012 17:22 To: Raghuraman Ramachandran; r-help@r-project.org Subject: RE: Help with vectors and rollapply It looks like you already have the zoo package loaded so

Re: [R] Help with vectors and rollapply

It looks like you already have the zoo package loaded so you can use its na.locf(), which replaces NA's with the last non-NA value. Convert the 0s to NAs with replace() and feed the result into na.locf(): a <- c(-2,0,0,0,1,0,0,3,0,0,-4) aOut <- c(-2,-2,-2,-2,1,1,1,3,3,3,-4) na.locf(replace