[R] Error with function lda in package MASS (dimnames not equal?)

[Gabor Grothendieck]

On 6/10/05, Joshua Gilbert <joshuacgilbert at gmail.com> wrote:
> This question appears to have been asked previously, but not answered.
> the last response I can find to this previous thread is here:
> http://tolstoy.newcastle.edu.au/R/help/04/07/0126.html. The asnwer was
> to provide debugging info, not an answer.
> 
> So the problem is that I'm trying to use lda on my dataset. You can
> download my data here:
> http://northstar-www.dartmouth.edu/~jgilbert/nolda, I used R's save
> function to save objects data and classes (yes, I realize that I name
> stomped the data function in package utils). To replicate my results,
> simply enter the following:
> > library(MASS)
> > load('nolda')
> > lda(data,classes)
> Error in lda.default(x, grouping, ...) : length of 'dimnames' [2] not
> equal to array extent
> 
> Now, I don't know what that means.
> > dimnames(data)
> NULL
> > dimnames(classes)
> NULL
> 
> As for debugging, I don't know how. I cannot debug lda.default as I
> get the following:
> > debug(lda.default)
> Error: Object "lda.default" not found

debug(MASS:::lda.default)