[R] How to get R to ignore certain values when analyzing a column in a data table ?
Daryl Manning
dwm at wakatara.com
Mon Jul 10 05:01:10 CEST 2006
Apologies if this is in (one of the many) manuals somewhere... Trying
to switch to R from other stats programs.
Basically, I have a large data table I've dumped from a DB, some of
the values which are nulls '-' which I've converted to zeros. I've
read it in using read.table fine.
I want R to ignore the zero values when graphing or doing various
other calculations.
Is there a way to do this ?
I did try to use NA but kept getting errors that x must be numeric.
thanks in advance,
Daryl.
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