FAQ
But, assuming you accept replacing each NA by the
global mean or median, the same operation can
be done avoiding the for(), which is always
better:
x<-c(NA,12,NA,14,15,17,21)
x[is.na(x)] <- median(x,na.rm=T)
x
[1] 15 12 15 14 15 17 21

Agus

Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo at ija.csic.es

On Wed, 27 Feb 2002, E. D. Isaia wrote:

With this function you may replace the NA with the mean or median of the non
missing values

## replace NA
##
rep.na<-function(x, my.mean=TRUE)
{
if (!my.mean){valore<-median(x[!is.na(x)])}
else {valore<-mean(x[!is.na(x)])}
for (i in (1:length(x))){if (is.na(x[i])==TRUE) {x[i]<-valore}}
x<<-x
}
##
##
i.e.
(x<-c(NA,12,NA,14,15,17,21))
[1] NA 12 NA 14 15 17 21
(rep.na(x))
[1] 15.8 12.0 15.8 14.0 15.0 17.0 21.0
(rep.na(x,my.meanúLSE))
[1] 15 12 15 14 15 17 21

Good job, isaia.

juan pablo perez wrote:
Dear R community:

it is possible to replace NA´s in a data frame with zeroes?
what should I do?

Juan Pablo

_________________________________________________________________
MSN Photos es la manera más sencilla de compartir e imprimir sus fotos:
http://photos.latam.msn.com/Support/WorldWide.aspx

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Ennio D. Isaia
~ Dep. of Statistics & Mathematics, University of Torino
~ Piazza Arbarello, 8 - 10128 Torino (Italy)
~ Phone: +39 011 670 62 51 ~~ Fax: +39 011 670 62 39
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

## Related Discussions

 view thread | post posts ‹ prev | 5 of 5 | next ›
Discussion Overview
 group r-help categories r posted Feb 25, '02 at 3:24p active Feb 27, '02 at 9:50a posts 5 users 5 website r-project.org irc #r

### 5 users in discussion

Content

People

Support

Translate

site design / logo © 2017 Grokbase