Re: [R] Specify model with polynomial interaction terms up to degree n

Yep, that code is verbatim what I typed in, using version 2.14 ... seems weird. -- View this message in context: http://r.789695.n4.nabble.com/Specify-model-with-polynomial-interaction-terms-up-to-degree-n-tp4635130p4636031.html Sent from the R help mailing list archive at Nabble.com. _

Re: [R] Specify model with polynomial interaction terms up to degree n

Hi Rui, Thanks for responding. I did not write "raw=raw", and I'm not sure why R would return such a misleading error message. Indeed, the same error message comes up when I run the 2nd part of your code: > m <- matrix(1:6, ncol=2) > p6 <- poly(m, degree=6, raw=TRUE) Error in poly(dots[[1L]],

Re: [R] Specify model with polynomial interaction terms up to degree n

I think you have taken my toy example seriously. Perhaps I wasn't clear, but I am in fact not working with a dataset of 3 observations of the numbers 1 through 6 and trying to estimate anything; that was an example to illustrate what I am asking for, namely, turning two variables like this X1 X2

Re: [R] Specify model with polynomial interaction terms up to degree n

I am not sure that method works. It appears to be doing something close, but returns too many slope coefficients, since I think it is returning interaction terms of degree smaller and greater than what was passed to it. Here is a small example of degree 2: > X = data.frame(cbind(c(1,2,3), c(4,5,

Re: [R] Specify model with polynomial interaction terms up to degree n

Hi Bert, thank you for pointing out that this method does not work. Do you happen to have any ideas as to how it could be done? Many thanks. -- View this message in context: http://r.789695.n4.nabble.com/Specify-model-with-polynomial-interaction-terms-up-to-degree-n-tp4635130p4635197.html Sent fr

[R] Specify model with polynomial interaction terms up to degree n

I would like to specify a model with all polynomial interaction terms between two variables, say, up to degree 6. For example, terms like a^6 + (a^5 * b^1) + (a^4 * b^2) + ... and so on. The documentation states The ^ operator indicates crossing to the specified degree. so I would expect a mod

Re: [R] package ‘rggobi’ is not available (for R version 2.15.0)

My criticism is aimed at the previous reply, which gave an arcane and not helpful suggestion (granted, it may only seem that way to me because of my own incompetence, but I don't know that the knowledge needed to understand "binary package" and "install from the sources" is what you want to requi

Re: [R] package ‘rggobi’ is not available (for R version 2.15.0)

I don't know what a "binary package" or "install from the sources" means. At any rate I think I have found a simpler solution to my problem. I read the following in the rggobi package readme file: Packages Cubist, OSACC, RSvgDevice, RSVGTipsDevice, SNPassoc, SNPRelate, eco, gcmre

[R] package ‘rggobi’ is not available (for R version 2.15.0)

I am having problems installing package rggobi. I have spent days reading other people's questions about this topic but could not get any useful info out of previous answers. I am running 32-bit Windows 7 and have successfully installed GGobi version 2.1.8. My error looks like this: > install.p