[R] data frame question
Bill.Venables at csiro.au
Bill.Venables at csiro.au
Fri Feb 15 07:38:29 CET 2008
... or in one step
df <- transform(df,
col1 = ifelse(col1 > 3, NA, col1))
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of K. Elo
Sent: Friday, 15 February 2008 4:29 PM
To: r-help at r-project.org
Subject: Re: [R] data frame question
Hi,
joseph wrote (15.2.2008):
> Thanks. I have another question:
> In the following data frame df, I want to replace all values in col1
> that are higher than 3 with NA. df= data.frame(col1=c(1:5, NA),col2=
> c(2,NA,4:7))
My suggestion:
x<-df$col1; x[ x>3 ]<-NA; df$col1<-x; rm(x)
-Kimmo
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