add tanh activation

Author: pplonski

keras_model.cc

@@ -214,6 +214,10 @@ keras::DataChunk* keras::LayerActivation::compute_output(keras::DataChunk* dc) {
       for(unsigned int k = 0; k < y.size(); ++k) {
         y[k] = 1/(1+exp(-y[k]));
       }
+    } else if(m_activation_type == "tanh") {
+      for(unsigned int k = 0; k < y.size(); ++k) {
+        y[k] = tanh(y[k]);
+      }
     } else {
       keras::missing_activation_impl(m_activation_type);
     }

test_run.sh

@@ -3,8 +3,8 @@
 echo 'Test for CNN dumping'
 
 # Parameters
-INPUT_ARCH="../../keras2cpp_nets/th/52c55ce6-201b-4ce4-ad53-68b86d79804f.cnn.architecture.json"
-INPUT_WEIGHTS="../../keras2cpp_nets/th/52c55ce6-201b-4ce4-ad53-68b86d79804f.cnn.model.h5"
+INPUT_ARCH="example/my_nn_arch.json"
+INPUT_WEIGHTS="example/my_nn_weights.h5"
 
 DUMPED_CNN="test_cnn.dumped"
 DATA_SAMPLE="test_random_input.dat"