[R] Help on Principal Component Analysis in R
emanekaf5 at gmail.com
Wed Jan 14 00:17:11 CET 2015
I am a beginner to R. I have read several guides, but still am stuck on
I have data in an excel csv file, on which I want to run PCA.
I'm not sure how the prcomp formula works. The help page states:
prcomp(x, retx = TRUE, center = TRUE, scale. = FALSE,
tol = NULL, ...)
what is x referring to? I tried putting the file name for x, but i get the
Error in colMeans(x, na.rm = TRUE) : 'x' must be numeric
what kind of numeric value do I need to put in for x?
Potentially helpful information: my data sheet has around 48 columns and
over 7000 rows. I have converted the csv file into a matrix in R.
Thanks in advance for all your help.
I'd appreciate step by step instructions on how to go from my csv file to a
PCA biplot in R.
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