Merge pull request #611 from ranjan1990/SGD

little change in SGDTestFunction::Gradient()

COPYRIGHT.txt

@@ -54,6 +54,7 @@ Copyright:
   Copyright 2016, Alexander Leinoff <alexander-leinoff@uiowa.edu>
   Copyright 2016, Palash Ahuja <abhor902@gmail.com>
   Copyright 2016, Yannis Mentekidis <mentekid@gmail.com>
+  Copyright 2016, Ranjan Mondal <ranjan.rev@gmail.com>
 License: BSD-3-clause
   All rights reserved.
   .

src/mlpack/core.hpp

@@ -189,6 +189,7 @@
  *   - Alexander Leinoff <alexander-leinoff@uiowa.edu>
  *   - Palash Ahuja <abhor902@gmail.com>
  *   - Yannis Mentekidis <mentekid@gmail.com>
+ *   - Ranjan Mondal <ranjan.rev@gmail.com>
  */
 
 // First, include all of the prerequisites.

src/mlpack/core/optimizers/sgd/test_function.cpp

@@ -41,7 +41,7 @@ void SGDTestFunction::Gradient(const arma::mat& coordinates,
       if (coordinates[0] >= 0)
         gradient[0] = std::exp(-coordinates[0]);
       else
-        gradient[0] = -std::exp(coordinates[1]);
+        gradient[0] = -std::exp(coordinates[0]);
       break;
 
     case 1: