[R] read in a matrix, difference between 1.3.1 (Windows) and 1.4.1 (Unix)

Petra Steiner steinep at uni-muenster.de
Tue Apr 30 15:11:13 CEST 2002


I am reading in a matrix with ignoring the first line. With the exception of
the first column (column names) each value is numeric.

Up to now the following worked well, although a bit slow.

tabx <-  matrix(scan("myfile", what =
"", skip=1, quote = ""), byrow=T, nrow=reihenz, ncol=spaltenz)
taby <- apply(tabx[1:reihenz,2:spaltenz], 2, as.numeric)
rownames(taby) <- tabx[,1]

Now, with Version 1.4.1 under Unix, for tabx I get a table with the first line
repeated many times. as.numeric is not applicable of course.

Maybe read.table would be better? But I have to read a lot of data!

Petra Steiner

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