X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fhistogram.h;h=89d4f5e869e7e5a69c767c33546942c811131ab8;hb=cc62e6937ff0410a356682b5757cf99788faa888;hp=f03e767c5eec3cdc72e0d284b805689e4885eb5d;hpb=bb75ec3b2fe601c6b942f5cda283b82925dd745d;p=pspp

diff --git a/src/math/histogram.h b/src/math/histogram.h
index f03e767c5e..89d4f5e869 100644
--- a/src/math/histogram.h
+++ b/src/math/histogram.h
@@ -14,8 +14,8 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
-#ifndef __NEW_HISTOGRAM_H__
-#define __NEW_HISTOGRAM_H__
+#ifndef __HISTOGRAM_H__
+#define __HISTOGRAM_H__
 
 #include <stddef.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);