if(){} else{}
Hi Hans, try this ... mat <- as.data.frame(cbind(Plant,Value1,Value2)) mat$Plant1 <- ifelse(is.na(mat$Plant), "A", "B") Cheers Andrew
On Tue, Dec 05, 2006 at 04:33:15PM +0100, Hans-Juergen Eickelmann wrote:
Dear R-community,
my data set looks like 'mat' below.
Plant<-c(NA,1,1,1,NA,NA,NA,NA,NA,1);
Value1<-rnorm(1:10);
Value2<-rnorm(1:10);
mat<-cbind(Plant,Value1,Value2);
I receive data from two different sites.
One site is identified by an interger number, the other site has no data in
column Plant=NA.
My pb:
I'm trying to assign labels "A" or "B" to these 2 sites into a new column,
but my if(){} else{} statement fails with the following statement:
Error in if (is.na(mat$Plant == TRUE)) { :
argument is of length zero
if(is.na(mat$Plant==TRUE)){mat$Plant1="A"} else{mat$Plant1="B"};
I looked through the avail doc and R-help for some time but wasn't able to
fix the pb.
Thx Hans
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