# HG changeset patch
# User James Bergstra <bergstrj@iro.umontreal.ca>
# Date 1224869280 14400
# Node ID 8ff412852d667d3916e5c1439705606cf1884633
# Parent  11e0357f06f41d37bac416a44238eaa841df8768
added sgd

diff -r 11e0357f06f4 -r 8ff412852d66 algorithms/sgd.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/algorithms/sgd.py	Fri Oct 24 13:28:00 2008 -0400
@@ -0,0 +1,13 @@
+
+from theano.compile import module
+
+class StochasticGradientDescent(module.FancyModule):
+    def __init__(self, params, gparams, lr=None):
+        super(StochasticGradientDescent, self).__init__()
+
+        self.lr = lr if lr is not None else module.Member(T.dscalar())
+        self.params = params
+        self.gparams = gparams
+
+        self.updates = dict((p, p - self.lr * g) for p, g in zip(self.params, self.gparams))
+