On Jul 16, 2011, at 4:08 AM, E- Cognium wrote:
Hi Everyone,
I would like to scale a data frame and then using the same scaling
parameters scale on another data frame. This will be helpful in
scaling the
test dataset based on train dataset's scaling parameters. I couldn't
find
any utility functions that do this. Any suggestions on how to
approach this
problem?
x = data.frame(a=1:10,b=11:20)
y = data.frame(a=2:11,b=12:21)
s <- scale(x)
###
### would like scale 'y' using the parameters contained in 's'
Just look at s and consult the obvious help page...
?attr
attr(s,"scaled:center")
attr(s,"scaled:scale")
--
David Winsemius, MD
West Hartford, CT
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