Dear Bjørn-Helge, Sorry, I wrote the wrong number of observation. It should be 1184.
I saw on the book that variance is defined by sd^2. If variation is a different concept from variance and defined by sd^2*(n-1) ? Since I formerly took variance and variation as the same. Thank you, Shengzhe Shengzhe Wu writes: > I have a data set with 15 variables (first one is the response) and > 1200 observations. Now I use pls package to do the plsr as below. [...] > Because the trainSet has been scaled before training, I think Xtotvar > should be equal to 14, but unexpectedly Xtotvar = 16562, Because the Xtotvar is the "total X variation", measured by sum(X^2) (where X has been centered). With 14 variables, scaled to sd == 1, and 1200 observations, you should get Xtotvar == 14*(1200-1) == 16786. (Maybe you have 1184 observations: 14*1183 == 16562.) -- Bj?rn-Helge Mevik ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
