The variables do all come from a frame but with various transformations and manipulations. I prefer not to stick them all into a new frame just to call one function.
Thanks again,
Murray Jorgensen
Prof Brian Ripley wrote:
On 14 May 2004, Peter Dalgaard wrote:
Murray Jorgensen <[EMAIL PROTECTED]> writes:
Greetings all!
This problem occurs using R 1.8.1 on Windows XP. I downloaded the binaries for R and all packages, including the VR bundle, in December 2003.
The data consists of NZ$ prices and attributes for 643 cars.
> summary(price) Min. 1st Qu. Median Mean 3rd Qu. Max. NA's 14290 35800 48990 65400 79000 285000 2 > library(MASS) > boxcox(price ~ doors+CC+KW+KG+LENGTH, lambda=seq(-0.1,0.5,length=30)) > boxcox(price ~ doors+CC+KW+KG+LENGTH, lambda=seq(-0.5,0.1,length=30))
This all works fine, I get a fairly sharp peak near lambda=-0.25, but then:
> logtrans(price ~ doors+CC+KW+KG+LENGTH, alpha=seq(-10000,0,length=30)) Error in eval(expr, envir, enclos) : Object "price" not found
The issue is that logtrans has a 'data' argument that defaults to NULL (the author(s) may have a reason for having this inconsistent with boxplot?). Adding data=.GlobalEnv seems to work.
It's an R/S difference. data=NULL or list() in S does give you the normal search path. I guess this got noticed for boxplot and not logtrans.
Using a data argument would in any case be a very good idea.
-- Dr Murray Jorgensen http://www.stats.waikato.ac.nz/Staff/maj.html Department of Statistics, University of Waikato, Hamilton, New Zealand Email: [EMAIL PROTECTED] Fax 7 838 4155 Phone +64 7 838 4773 wk +64 7 849 6486 home Mobile 021 1395 862
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