theanets.feedforward.Regressor

class theanets.feedforward.Regressor(layers=(), loss='mse', weighted=False, rng=13)

A regressor attempts to produce a target output given some inputs.

Notes

Regressor models default to a MSE loss. To use a different loss, provide a non-default argument for the loss keyword argument when constructing your model.

Examples

To create a regression model, just create a new class instance. Often you’ll provide the layer configuration at this time:

>>> model = theanets.Regressor([10, 20, 3])

See Creating a Model for more information.

Data

Training data for a regression model takes the form of two two-dimensional arrays. The shapes of both of these arrays are (num-examples, num-variables) – the first axis enumerates data points in a batch, and the second enumerates the relevant variables (input variables for the input array, and output variables for the output array).

For instance, to create a training dataset containing 1000 examples:

>>> inputs = np.random.randn(1000, 10).astype('f')
>>> outputs = np.random.randn(1000, 3).astype('f')

Training

Training the model can be as simple as calling the train() method, with the inputs and target outputs as data:

>>> model.train([inputs, outputs])

See Training a Model for more information.

Use

A regression model can be used to predict() the output of some input data points:

>>> test = np.random.randn(3, 10).astype('f')
>>> print(model.predict(test))

See Using a Model for more information.

__init__(layers=(), loss='mse', weighted=False, rng=13)

Methods

Attributes

DEFAULT_OUTPUT_ACTIVATION
INPUT_NDIM
inputs	A list of Theano variables for feedforward computations.
num_params	Number of parameters in the entire network model.
params	A list of the learnable Theano parameters for this network.
variables	A list of Theano variables for loss computations.