X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fleast-squares.cc;h=9c250bea915e7590396ef1bb071ec06ddf5ab413;hb=a6a51abfd0195a3cf7d6ea095cf69808852f21ce;hp=d95279a54e0d801420b28b6348f3b0f76f2583d1;hpb=f9214bac21e9926dc3248416f58190c98c4167a9;p=lilypond.git

diff --git a/lily/least-squares.cc b/lily/least-squares.cc
index d95279a54e..9c250bea91 100644
--- a/lily/least-squares.cc
+++ b/lily/least-squares.cc
@@ -1,9 +1,20 @@
 /*
-  least-squares.cc -- implement minimise_least_squares
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1996--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1996--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "least-squares.hh"
@@ -12,21 +23,21 @@
 
 void
 minimise_least_squares (Real *coef, Real *offset,
-			vector<Offset> const &input)
+                        vector<Offset> const &input)
 {
   Real sx = 0.0;
   Real sy = 0.0;
   Real sqx = 0.0;
   Real sxy = 0.0;
 
-  for (vsize i = 0; i < input.size ();i++)
+  for (vsize i = 0; i < input.size (); i++)
     {
       Real x = input[i][X_AXIS];
       Real y = input[i][Y_AXIS];
       sx += x;
       sy += y;
       sqx += sqr (x);
-      sxy += x*y;
+      sxy += x * y;
     }
 
   int count = input.size ();
@@ -37,7 +48,9 @@ minimise_least_squares (Real *coef, Real *offset,
   Real den = (count * sqx - sqr (sx));
   if (!count || !den)
     {
-      programming_error ("minimise_least_squares ():  Nothing to minimise");
+      programming_error ("minimise_least_squares ():  Nothing to minimise\n"
+                         "This means that vertical spacing is triggered\n"
+                         "before line breaking\n");
       *coef = 0.0;
       *offset = count ? sy / count : 0.0;
     }