Dear List Members I'd like to make sure I understand results of "get.siggenes" correctly. I've make model with degree=4 and I get following coefficients (with my interpretation): beta0 (intercept component for control) betacoldvsctrl (intercept component for cold vs control) betaczas (linear component for control) betaczasxcold (linear component for cold) betaczas2 (quadratic component for control) betaczas2xcold (quadratic component for cold) ... and so on to four order. And in sig.pvalues there are corresponding p-values. Is it right? I also have question regarding plots generated by PlotGroups. Here one can use step.method option to obtain regression curve. Possible values are the same as in T.fit, so I suppose that if I use the same method in both T.fit and PlotGroups I'll get proper regression curve. The problem is that curve sometimes fit bad to points (examined by eye). Is it because of low R-square threshold (I used 0.60)? Or is it because not all variables are selected in regression? Any help will be very appreciated. I'd like to use this results in my Ph.D thesis. Best regards, Maciej Jo?czyk, MSc Department of Plant Molecular Ecophysiology Institute of Plant Experimental Biology Faculty of Biology, University of Warsaw 02-096 Warszawa, Miecznikowa 1 ___________________________________ NOCC, http://nocc.sourceforge.net -- This email was Anti Virus checked by Astaro Security Gateway. http://www.astaro.com