On 26/02/2019 10:34 p.m., John wrote:
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!
There are at least two packages (zoo and imputeTS) which have na.locf
functions. The one in zoo does what you want:
> zoo::na.locf(c(NA,NA,1,4,NA,2), na.rm=FALSE)
[1] NA NA 1 4 4 2
Duncan Murdoch