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JC, If each row are the counts for a 2 x 2 contingency table - so for the ith contingency table you have counts for row 1 c(Y08[i],Z08[i]) and row 2 (Y09[i],Z09[i]) then you...
Is spectra.wavelength a factor? If so, plot will treat it as categorical and not draw a line. Try the following modification. plot(as.numeric(spectra.wavelength), cormat, type = "l", ylim=c(-1,1), xlab="Wavelength (nm)", ylab="Correlation") Quoting...
One simple adjustment is the following: apply(matrix(x[rows,],nr=length(rows)),2,mean) Quoting Peter Kharchenko <peter.kharchenko at post.harvard.edu>: > Dear fellow R users, > I can't figure out how to do a simple thing properly...
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