Using I() in the data.frame seems ill-advised to me. You complain about 96 variables but from reading your explanation that seems to be what your data are. I have no idea whether it makes sense to NOT have 96 variables if that is what your data are. Note that a reproducible example supplied by you might help us guess better, but it might just be that your expectations are wrong. -- Sent from my phone. Please excuse my brevity.
On January 13, 2016 11:02:25 AM PST, CG Pettersson <cg.petters...@lantmannen.com> wrote: >R version 3.2.3, W7 64bit. > >Dear all! > >I am trying to make pls-regression using plsr() from package pls, with >Mevik & Wehrens (2007) as tutorial and the datasets from the package. >Everything works real nice as long as I use the supplied datasets, but >I don�t understand how to prepare my own data. >This is what I have done: > >> frame1 <- data.frame(gushVM, I(n96)) > >Where gushVM is a vector with fifteen reference analysis values of a >quality problem in grain and n96 is a matrix with fifteen rows and 96 >columns from an electronic nose. I try to copy the methods as in 3.2 in >Mevik & Wehrens, and want to keep n96 as one variable to avoid >addressing 96 different variables in the plsr call. If I don�t use I() >in the call I get 96 variables instead. >Looking at the dataframe by summary(frame1) get a return quite like >summary(gasoline) from the package (not shown here). >But when I try to use plsr() with my own data it doesn�t work due to an >error in the data structure: > >> pls1 <- plsr(gushVM ~ n96, data = frame1) >Error in model.frame.default(formula = gushVM ~ n96, data = frame1) : > invalid type (list) for variable 'n96' >> >So, n96 has turned into a list, and that is a problem. If gushVM is a >vector (one variable) och a matrix (five variables) does not seem to >change anything, managing n96 is the problem >I have tried all alternative ways of creating a proper data frame >suggested in the article with exactly the same result. >I have tried the documentation for data.frame() but I probably don�t >understand what it says. > >What should I do to change "n96" into something better than "list"? > >Thanks >/CG > >Med v�nlig h�lsning/Best regards >CG Pettersson >Scientific Project Manager, PhD >______________________ >Lantm�nnen Corporate R&D >Phone: +46 10 556 19 85 >Mobile: + 46 70 330 66 85 >Email: >cg.petters...@lantmannen.com<mailto:cg.petters...@lantmannen.com> >Visiting Address: S:t G�ransgatan 160 A >Address: Box 30192, SE-104 25 Stockholm >Webb: http://www.lantmannen.com<http://www.lantmannen.com/> >Registered Office: Stockholm >Before printing, think about the environment > > > [[alternative HTML version deleted]] > > > >------------------------------------------------------------------------ > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
