[Rd] [patch] Support many columns in model.matrix

Karl Millar kmillar at google.com
Sat Feb 27 00:58:20 CET 2016

Generating a model matrix with very large numbers of columns overflows
the stack and/or runs very slowly, due to the implementation of

This patch modifies it to use Rf_duplicated() to find the duplicates.
This makes the running time linear in the number of columns and
eliminates the recursive function calls.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: stats_model.patch
Type: text/x-patch
Size: 2182 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-devel/attachments/20160226/b54f1cc2/attachment.bin>

More information about the R-devel mailing list