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+// Copyright (C) 2015 - IIT Bombay - FOSSEE
+//
+// Author: Harpreet Singh
+// Organization: FOSSEE, IIT Bombay
+// Email: harpreet.mertia@gmail.com
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+
+// <-- JVM NOT MANDATORY -->
+// <-- ENGLISH IMPOSED -->
+
+
+//
+// assert_close --
+//   Returns 1 if the two real matrices computed and expected are close,
+//   i.e. if the relative distance between computed and expected is lesser than epsilon.
+// Arguments
+//   computed, expected : the two matrices to compare
+//   epsilon : a small number
+//
+function flag = assert_close ( computed, expected, epsilon )
+  if expected==0.0 then
+    shift = norm(computed-expected);
+  else
+    shift = norm(computed-expected)/norm(expected);
+  end
+//  if shift < epsilon then
+//    flag = 1;
+//  else
+//    flag = 0;
+//  end
+//  if flag <> 1 then pause,end
+    flag = assert_checktrue ( shift < epsilon );
+endfunction
+//
+// assert_equal --
+//   Returns 1 if the two real matrices computed and expected are equal.
+// Arguments
+//   computed, expected : the two matrices to compare
+//   epsilon : a small number
+//
+//function flag = assert_equal ( computed , expected )
+//  if computed==expected then
+//    flag = 1;
+//  else
+//    flag = 0;
+//  end
+//  if flag <> 1 then pause,end
+//endfunction
+
+ //A simple linear least square example
+C = [0.9501    0.7620    0.6153    0.4057
+     0.2311    0.4564    0.7919    0.9354
+     0.6068    0.0185    0.9218    0.9169
+     0.4859    0.8214    0.7382    0.4102
+     0.8912    0.4447    0.1762    0.8936];
+ d = [0.0578
+     0.3528
+     0.8131
+     0.0098
+     0.1388];
+ A =[0.2027    0.2721    0.7467    0.4659
+     0.1987    0.1988    0.4450    0.4186
+     0.6037    0.0152    0.9318    0.8462];
+ b =[0.5251
+     0.2026
+     0.6721];
+ Aeq = [3 5 7 9];
+ beq = 4;
+ lb = -0.1*ones(4,1);
+ ub = 2*ones(4,1);
+ [xopt,resnorm,residual,exitflag,output,lambda] = lsqlin(C,d,A,b,Aeq,beq,lb,ub)
+
+assert_close ( xopt , [ -0.1, -0.1, 0.1599089, 0.4089598 ]' , 0.0005 );
+assert_close ( residual , [ 0.0352969 0.0876228 -0.3532508 0.1452700 0.1212324 ]' , 0.0005 );
+assert_close ( resnorm , [ 0.1695104] , 0.0005 );
+
+assert_checkequal( exitflag , int32(0) );