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lsmusesgd's Introduction

LSMuseSGD Build Status

確率的勾配降下法(SGD)を使って最小二乗法を実装した.

Demo

アニメーションを使って学習する様子 alt

Usage

Python

PythonはChainerによく似たライブラリを用意したのでLSM_likely_Chainer.pyを利用されたい.

また,適当にデータを用意して実行したものがtrain_LSM_with_SGD.pyをサンプルとして用意した.

Define model and training

import likely_chainer.models
import likely_chainer.optimizers

# Define parameter
dim = 2
alpha = 0.01
epoch = 1000
model = likely_chainer.models.LSM(dimension=dim, learning_rate=alpha)
# If you want define by run ...
model = likely_chainer.models.LSM(dimension=dim, learning_rate=alpha, define_by_run=True)

optimizer = likely_chainer.optimizers.SGD()
optimizer.setup(model)

# This looks like chainer ...
for ep in range(epoch):
  for (x, y) in zip(train_x, train_y):
      model.zerograds()
      loss = model(x, y)
      loss.backward()
      optimizer.update()

# Predict data from test_x
pred_y = model(test_x).data

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