Hi error message indicates that you have non numeric value in your table/ matrix. Replace missing value by NA and add na.rm= true in your command prcomp. Karim Le 14 janv. 2015 00:27, "R Help!" <emanek...@gmail.com> a écrit :
> Hello! > > I am a beginner to R. I have read several guides, but still am stuck on > this: > > 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 > following error: > 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. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
