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

... 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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