X-Git-Url: http://gitweb.michael.orlitzky.com/?p=octave.git;a=blobdiff_plain;f=divided_difference.m;h=3225f293d41e2f5c9bd977978d64cf6acb880a26;hp=785b66f27e812ff0d908bdbf317b05077e15d694;hb=4517c1d860795cc0c40c2e12ce266d7a4bdfec16;hpb=437324f2edf6b26c772080f8cbe3b321dda8d70f

diff --git a/divided_difference.m b/divided_difference.m
index 785b66f..3225f29 100644
--- a/divided_difference.m
+++ b/divided_difference.m
@@ -16,9 +16,12 @@ function dd = divided_difference(f, xs)
   ##
   ##   * ``dd`` - The divided difference f[xs(1), xs(2),...]
   ##
-  addpath('../homework1/src');
+  if (exist('../homework1/src', 'dir'))
+    addpath('../homework1/src');
+  end
+
   order = length(xs) - 1;
-  
+
   if (order < 0)
     ## Can't do anything here. Return nothing.
     dd = NA;