Bug ? mine or ? in R core

Thanks, Peter, it seems to do the trick.  I spent a lot of
time trying first to reproduce then identify this one!

What is the 'approved' method of resizing a vector?
Is SET_LENGTH deprecated, or does it just happen that there is
no need for it in tht R internals?


Michael

/* transpose it */
DBG(1,"trimming");
SET_LENGTH(data,j*NCOLS); /* trim down buffer*/

  ^^^^^^^^^^^^^^^^^^^^^^^^

I'm not too well accustomed to these macros (they aren't used in the R
internals), but in Rdefines.h we have

#define SET_LENGTH(x, n)       (x = lengthgets(x, n))

so I wouldn't count on "data" being the same after those operations,
and in particular not expect it to be protected anymore. You probably
need to stick in "UNPROTECT(1); PROTECT(data);" after the SET_LENGTH
operations.

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