R help - Oct 2010 - Vector replace 0 elements without using a loop

Hi,

With a vector like:

x = c (22, 23, 22.5, 0,0,24, 0, 23.2, 23.5, 0,0,0, 26)

How can I replace the 0's with the previous last value without looping
through the vector ?

Something tells me I am missing the obvious.

Thanks,
Chris
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Hi


r-help-bounces at r-project.org napsal dne 07.10.2010 07:16:01:
> 
> Hi,
> 
> With a vector like:
> 
> x = c (22, 23, 22.5, 0,0,24, 0, 23.2, 23.5, 0,0,0, 26)
> 
> How can I replace the 0's with the previous last value without looping
> through the vector ?
Change your zeroes to NA values
x[x==0]<-NA

use na.locf function from zoo package

library(zoo)

x<-na.locf(x)

Regards
Petr

> 
> Something tells me I am missing the obvious.
> 
> Thanks,
> Chris
> -- 
> View this message in context: 
http://r.789695.n4.nabble.com/Vector-replace-0-
> elements-without-using-a-loop-tp2966191p2966191.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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