[R] string/character to number

From: Jake Michaelson <jjmichael_at_comcast.net>
Date: Thu 23 Jun 2005 - 07:35:07 EST


I did a very quick search of the archive and couldn't find a readily available answer to this one:

I'd like to convert, for example:

c("a", "b", "a", "b")

to

c(1, -1, 1, -1)

In the case of the first vector, it may be any length, but will always only have two unique values. It must always be replaced by corresponding values of 1 and -1.

Any thoughts?

Thanks in advance,

Jake



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jun 23 07:46:29 2005

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