1 files changed, 34 insertions, 0 deletions
diff --git a/model/dest_mlp_tgtcls.py b/model/dest_mlp_tgtcls.py
new file mode 100644
index 0000000..46fca2b
--- /dev/null
+++ b/model/dest_mlp_tgtcls.py
@@ -0,0 +1,34 @@
+import numpy
+import theano
+from theano import tensor
+from blocks.bricks import application, Softmax
+
+import error
+from model.mlp import FFMLP, Stream
+
+
+class Model(FFMLP):
+    def __init__(self, config, **kwargs):
+        super(Model, self).__init__(config, output_layer=Softmax, **kwargs)
+        self.classes = theano.shared(numpy.array(config.tgtcls, dtype=theano.config.floatX), name='classes')
+
+    @application(outputs=['destination'])
+    def predict(self, **kwargs):
+        cls_probas = super(Model, self).predict(**kwargs)
+        return tensor.dot(cls_probas, self.classes)
+
+    @predict.property('inputs')
+    def predict_inputs(self):
+        return self.inputs
+
+    @application(outputs=['cost'])
+    def cost(self, **kwargs):
+        y_hat = self.predict(**kwargs)
+        y = tensor.concatenate((kwargs['destination_latitude'][:, None],
+                                kwargs['destination_longitude'][:, None]), axis=1)
+
+        return error.erdist(y_hat, y).mean()
+
+    @cost.property('inputs')
+    def cost_inputs(self):
+        return self.inputs + ['destination_latitude', 'destination_longitude']