X-Git-Url: http://gitweb.michael.orlitzky.com/?p=octave.git;a=blobdiff_plain;f=optimization%2Ftest_functions%2Frosenbrock_gradient.m;fp=optimization%2Ftest_functions%2Frosenbrock_gradient.m;h=50c4546ffffb5560891c1a3dff4abfe08423832d;hp=0000000000000000000000000000000000000000;hb=75563505172dce2cc78116f0884819ca32620dbe;hpb=1e0c72bb336872f0839305340eb9699a87a40319

diff --git a/optimization/test_functions/rosenbrock_gradient.m b/optimization/test_functions/rosenbrock_gradient.m
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+++ b/optimization/test_functions/rosenbrock_gradient.m
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+function g = rosenbrock_gradient(x1, x2)
+  ##
+  ## The gradient of the Rosenbrock function. See rosenbrock.m for more
+  ## information.
+  ##
+  f_x1 = -400*x1*(x2 - x1^2) + 2*x1 - 2;
+  f_x2 = 200*(x2 - x1^2);
+  g = [f_x1; f_x2];
+end