If I use the na.locf function to replace each NA with the most recent
non-NA prior to it, then
> na.locf(c(NA,NA,1,4,NA,2))
[1] 1 1 1 4 4 2
I want to keep leading NA's, and this is what I want
NA NA 1 4 4 2
How can I do it?
The following do not work:
> na.locf(c(NA,NA,1,4,NA,2), na.rm=FALSE)
Error in na.locf(c(NA, NA, 1, 4, NA, 2), na.rm = FALSE) :
unused argument (na.rm = FALSE)
> na.locf(c(NA,NA,1,4,NA,2), na.rm=TRUE)
Error in na.locf(c(NA, NA, 1, 4, NA, 2), na.rm = TRUE) :
unused argument (na.rm = TRUE)
Thank you very much!
John
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