# HG changeset patch
# User Vivek Dogra <vivek.dogra.iitd@gmail.com>
# Date 1345206150 14400
# Node ID 2d5e4d283688243cfe3337de8085ab6f3b43bdfc
# Parent  8367f326fa29204dfe0f59f3cdbf86253364003c
Modified interp1.m file to check whether X has distinct values or not.

diff --git a/doc/interpreter/contributors.in b/doc/interpreter/contributors.in
--- a/doc/interpreter/contributors.in
+++ b/doc/interpreter/contributors.in
@@ -48,6 +48,7 @@
 Bill Denney
 Fabian Deutsch
 Christos Dimitrakakis
+Vivek Dogra
 David M. Doolin
 Carnë Draug
 Pascal A. Dupuis
diff --git a/scripts/general/interp1.m b/scripts/general/interp1.m
--- a/scripts/general/interp1.m
+++ b/scripts/general/interp1.m
@@ -168,6 +168,11 @@
     y = y(p,:);
   endif
 
+ ## check whether sample point @var{x} are distinct; give error if not.
+  if (any (diff (x) == 0))
+    error ("interp1: X should have distinct values");
+  endif
+
   starmethod = method(1) == "*";
 
   if (starmethod)