[R] Applying lm to data with combn

[AliR]

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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