X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Fmath%2Finteraction.c;h=2f8da8ccaaa1fd4619a73415a8ff888cd097d9ac;hb=refs%2Fbuilds%2F20100716040502%2Fpspp;hp=2d670b2dc726ff98656dd9fbd967a9bfd96d04d3;hpb=97a777315ec2f2000ac67da1f405323a5e2294e2;p=pspp
diff --git a/src/math/interaction.c b/src/math/interaction.c
index 2d670b2dc7..2f8da8ccaa 100644
--- a/src/math/interaction.c
+++ b/src/math/interaction.c
@@ -1,5 +1,5 @@
/* PSPP - a program for statistical analysis.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2009, 2010 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
@@ -15,7 +15,7 @@
along with this program. If not, see . */
/*
- An interaction is a gsl_vector containing a "product" of other
+ An interaction is a structure 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
@@ -24,79 +24,255 @@
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
+#include
#include
-#include "interaction.h"
+#include
+#include