X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pspp;a=blobdiff_plain;f=src%2Fmath%2Fhistogram.h;fp=src%2Fmath%2Fhistogram.h;h=3f8fc3e7e75abdba3fb0fbbfb72ac769939c43b2;hp=f03e767c5eec3cdc72e0d284b805689e4885eb5d;hb=ac9640a64222cfcf36c401715cad0a2009a07fb6;hpb=5d489646dd5b0c4255c608691a91e639dd8c2ece

diff --git a/src/math/histogram.h b/src/math/histogram.h
index f03e767c5e..3f8fc3e7e7 100644
--- a/src/math/histogram.h
+++ b/src/math/histogram.h
@@ -30,7 +30,13 @@ struct histogram
   gsl_histogram *gsl_hist;
 };
 
-struct histogram * histogram_create (double bin_width, double max, double min);
+/* 
+   Prepare a histogram for data which lies in the range [min, max)
+   bin_width is a nominal figure only.  It is a hint about what might be
+   an good approximate bin width, but the implementation will adjust it
+   as it thinks fit.
+ */
+struct histogram * histogram_create (double bin_width, double min, double max);
 
 void histogram_add (struct histogram *h, double y, double c);