sort: Add support for combining cases with identical sort criteria.
authorBen Pfaff <blp@cs.stanford.edu>
Sun, 21 Mar 2010 19:40:41 +0000 (12:40 -0700)
committerBen Pfaff <blp@cs.stanford.edu>
Sat, 29 Nov 2014 20:44:55 +0000 (12:44 -0800)
commit490ac70d9c9f754f733552d64c23dd6aedced342
tree2f651c542b8d9762472b52a99ac2b13be1b0d40b
parent48ae4b998c76c9aaad4dca9090752cb9bd6e9f29
sort: Add support for combining cases with identical sort criteria.

This makes it possible to efficiently assemble frequency tables and
crosstabs for data sets that might be larger than available memory.
src/math/merge.c
src/math/merge.h
src/math/sort.c
src/math/sort.h