R help - Aug 2007 - Rows overlapped each other

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You might help me...I have shrunk the row captions which were so big they 
overlapped each other. The relevant options are cexRow and cexCol. But I 
tried this option without success in this code bellow:

library(Heatplus);
FieldSeparator=" ";
file='Hs.txt';
data<-read.table(file, header=TRUE, sep=FieldSeparator);
nofCols=ncol(data);
pt<-as.matrix(data[,2:nofCols]);
rownames(pt)=data[,1,];
output=paste(file, "default1.ps", sep=".");
postscript(output);
heatmap_2(pt, col=topo.colors(100), scale="none", legend=1, legfrac =
12);
dev.off();

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You might help me...I have shrunk the row captions which were so big they 
overlapped each other. The relevant options are cexRow and cexCol. But I 
tried this option without success in this code bellow:

library(Heatplus);
FieldSeparator=" ";
file='Hs.txt';
data<-read.table(file, header=TRUE, sep=FieldSeparator);
nofCols=ncol(data);
pt<-as.matrix(data[,2:nofCols]);
rownames(pt)=data[,1,];
output=paste(file, "default1.ps", sep=".");
postscript(output);
heatmap_2(pt, col=topo.colors(100), scale="none", legend=1, legfrac =
12);
dev.off();