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Hi. I'm trying to add some vertical lines to an xyplot in which x axis is a temporal variable (class=dates) and y axis a factor variable. This is my code: xyplot(factor(Abacus$Emisor)~Abacus$Dia,xlab="Date...
Hi all, I wonder if it's possible to include a double interaction in a GAM formula. Example: If I do this: mod=gam(energy~s(size, *by=color, by=sex*, k=5) + temperature, ...) I get the interaction betwen size...
Thanks Simon, for your quick reply. Now I have a different but related problem. Including by=colorsex I'm testing significant effects of each level of this variable. It's like doing a second level interaction (size*color*sex). But...
Hi. I'm analysing some fish biological traits with a gam in mgcv. After several tries, I got this model log(tle) = sexcolor + s(doy, bs = "cc", by = sexcolor) +log(tl) sexcolor is a factor with 4 levels doy is...
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