a) Please supply some context in your mail message. Not everyone reads R-help
via nabble.
b) poly(raw=TRUE, x, degree=degree) was changed for 2.15.0 to allow it to output
a non-full-rank matrix. See the NEWS file in 2.15.0 or after:
> # in R-2.15.1
> n <- news()
> n[grepl("poly", n$Text),]
Changes in version 2.15.0:
NEW FEATURES
o poly(raw = TRUE) no longer requires more unique points than the
degree. (Requested by John Fox.)
...
c) Error messages include the innermost R function call before the error. To
see more call traceback(),
which will show the call stack from the innermost call back to the call you
made:
> # in R-2.14.1
> m <- matrix(1:6, ncol=2)
> poly(m, degree=6, raw=TRUE)
Error in poly(dots[[1L]], degree, raw = raw) :
'degree' must be less than number of unique points
> traceback()
6: stop("'degree' must be less than number of unique points")
5: poly(dots[[1L]], degree, raw = raw)
4: cbind(1, poly(dots[[1L]], degree, raw = raw))
3: polym(V1 = 1:3, V2 = 4:6, degree = 6, raw = TRUE)
2: do.call("polym", c(m, degree = degree, raw = raw))
1: poly(m, degree = 6, raw = TRUE)
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf Of YTP
> Sent: Tuesday, July 10, 2012 11:23 AM
> To: r-help@r-project.org
> Subject: 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.
>
> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
