[R] Applying lm to data with combn

From: AliR <aaliraja_at_gmail.com>
Date: Fri, 8 Feb 2008 08:46:23 -0800 (PST)

http://www.nabble.com/file/p15359204/test.data.csv http://www.nabble.com/file/p15359204/test.data.csv test.data.csv

Hi,

I have used apply to have certian combinations, but when I try to use these combinations I get the error
[Error in eval(expr, envir, enclos) : object "X.GDAXI" not found]. being a novice I donot understand that after applying combination to the data I cant access it and use lm on these combinations. The data frame either is no longer a matrix, how can I access the data and make it work for lm!!

Any help please!

fruit = read.csv(file="test.data.csv",head= TRUE, sep=",")# read it in matrix format

#fruit =read.file(row.names=1)$data

mD =head(fruit[, 1:5])# only first five used in combinations
#X.SSMII = head(fruit[, 6])# Keep it for referebce
nmax = NULL
n = ncol(mD)# dont take the last column for reference purpose if(is.null(nmax)) nmax = n

mDD = apply(combn(5, 1),1, FUN= function(y) mD[, y])# to

fg = lm( X.SSMII ~ X.GDAXI + X.FTSE + X.FCHI + X.IBEX, data = mDD )# regress on combos

s = cbind(s, Residuals = residuals(fg))# take residuals

print(mD)

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Received on Fri 08 Feb 2008 - 17:37:29 GMT

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