X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=inline;f=src%2Fmath%2Finteraction.c;h=269aa7e9ad9af816a56b5c95d2fc4ce9ea90dbf7;hb=refs%2Fbuilds%2F20111129030502%2Fpspp;hp=05a8bf46bd4ade424cef3d9bec85fde043205ea5;hpb=14aac9fe7a7efbb6c9bded2ed5969a643cb76645;p=pspp
diff --git a/src/math/interaction.c b/src/math/interaction.c
index 05a8bf46bd..269aa7e9ad 100644
--- a/src/math/interaction.c
+++ b/src/math/interaction.c
@@ -1,5 +1,5 @@
/* PSPP - a program for statistical analysis.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -14,264 +14,213 @@
You should have received a copy of the GNU General Public License
along with this program. If not, see . */
-/*
- An interaction is a gsl_vector containing a "product" of other
- variables. The variables can be either categorical or numeric.
- If the variables are all numeric, the interaction is just the
- scalar product. If any of the variables are categorical, their
- product is a vector containing 0's in all but one entry. This entry
- is found by combining the vectors corresponding to the variables'
- OBS_VALS member. If there are K categorical variables, each with
- N_1, N_2, ..., N_K categories, then the interaction will have
- N_1 * N_2 * N_3 *...* N_K - 1 entries.
-
- When using these functions, make sure the orders of variables and
- values match when appropriate.
- */
-
#include
-#include
-#include
-#include
-#include
-#include
-#include