10-15-2014 04:26 PM
I have used a Neural Networks in EM for classification problem with default options. I want to know the default options of:
Hidden/Target layer combination function.
Hidden/Target layer activation function.
10-16-2014 05:37 PM
If you are using the Neural Network Node in Enterprise Miner with the defaults it will run the neural network with the Multilayer Perceptron architecture and 3 hidden units. You can check this in the Node Results, by looking at the log and seeing if the proc neural call uses "arch MLP Hidden = 3"
For Multilayer Perceptron (default setting in Enterprise Miner):
Hidden layer activation function = tanh
Hidden layer combination function = linear
The default target layer activation and combination functions are a bit more complicated, as it depends on the level of the target variable itself:
Target layer activation function = identity (if LEVEL = INTERVAL)
= logistic (if LEVEL = ORDINAL)
= mlogistic (if LEVEL = NOMINAL)
Target layer combination function = linear
I hope this helps. Most of this information came from the proc neural documentation if you care for further reading.