I want to do a logistic regression analysis, and to compare with, a discriminant analysis. The mentioned power maps are my exogenous data, the dependent variable (not mentioned so far) is a diagnosis (ill/healthy)
thanks for the interest and the help Christoph On Sun, 2003-06-01 at 21:01, Spencer Graves wrote: > What are you trying to do? What I would do with this depends on many > factors. > > spencer graves > > Christoph Lehmann wrote: > > again, under another subject: > > sorry, maybe an all too trivial question. But we have power data from J > > frequency spectra and to have the same range for the data of all our > > subjects, we just transformed them into % values, pseudo-code: > > > > power[i,j]=power[i,j]/sum(power[i,1:J]) > > > > of course, now we have a perfect linear relationship in our x design-matrix, > > since all power-values for each subject sum up to 1. > > > > How shall we solve this problem: just eliminate one column of x, or > > introduce a restriction which says exactly that our power data sum up to > > 1 for each subject? > > > > Thanks a lot > > > > Christoph > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help -- Christoph Lehmann <[EMAIL PROTECTED]> ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
