--- /usr/app-soft/octave/v4.0.0-1/share/octave/4.0.0/m/plot/draw/hist.m	2015-10-09 17:40:51.498753038 +0200
+++ hist.m	2015-10-22 10:17:59.352435667 +0200
@@ -26,8 +26,9 @@
 ## @deftypefnx {Function File} address@hidden, @var{xx}] =} hist (@dots{})
 ## Produce histogram counts or plots.
 ##
-## With one vector input argument, @var{y}, plot a histogram of the values
-## with 10 bins.  The range of the histogram bins is determined by the
+## With one vector input argument, @var{y}, plot a histogram of the values,
+## where the number of bins is determined by Freedman-Diaconis' choice.
+## The range of the histogram bins is determined by the
 ## range of the data.  With one matrix input argument, @var{y}, plot a
 ## histogram where each bin contains a bar per input column.
 ##
@@ -99,7 +100,8 @@
 
   iarg = 1;
   if (nargin == 1 || ischar (varargin{iarg}))
-    n = 10;
+    h = 2*iqr(y) / length(y)^(1/3); % Freedman-Diaconis' choice
+    n = round( (max_val - min_val) / h );
     x = [0.5:n]'/n;
     x = x * (max_val - min_val) + ones (size (x)) * min_val;
   else