Python LeastAngleRegression.apply 예제들

예제 #1

파일: regression_lars.py 프로젝트: serialhex/shogun

    lsr.train()
else:
    lsr = LeastSquaresRegression()
    lsr.set_labels(Labels(y))
    lsr.train(RealFeatures(X.T))

# gather LASSO path
path = np.zeros((p, LeastAngleRegression.get_path_size()))
for i in xrange(path.shape[1]):
    path[:,i] = LeastAngleRegression.get_w(i)

# apply on training data
mse_train = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_train.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(X.T)).get_labels()
    mse_train[i] = np.dot(ypred - y, ypred - y) / y.shape[0]
ypred = lsr.apply(RealFeatures(X.T)).get_labels()
mse_train_lsr = np.dot(ypred - y, ypred - y) / y.shape[0]

# apply on test data
mse_test = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_test.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(Xtest.T)).get_labels()
    mse_test[i] = np.dot(ypred - ytest, ypred - ytest) / ytest.shape[0]
ypred = lsr.apply(RealFeatures(Xtest.T)).get_labels()
mse_test_lsr = np.dot(ypred - ytest, ypred - ytest) / ytest.shape[0]

fig = plt.figure()
ax_path = fig.add_subplot(1,2,1)

예제 #2

    lsr = LeastSquaresRegression()
    lsr.set_labels(RegressionLabels(y))
    lsr.train(RealFeatures(X.T))

# gather LASSO path
path = np.zeros((p, LeastAngleRegression.get_path_size()))
for i in xrange(path.shape[1]):
    path[:, i] = LeastAngleRegression.get_w(i)

evaluator = MeanSquaredError()

# apply on training data
mse_train = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_train.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(X.T))
    mse_train[i] = evaluator.evaluate(ypred, RegressionLabels(y))
ypred = lsr.apply(RealFeatures(X.T))
mse_train_lsr = evaluator.evaluate(ypred, RegressionLabels(y))

# apply on test data
mse_test = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_test.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(Xtest.T))
    mse_test[i] = evaluator.evaluate(ypred, RegressionLabels(y))
ypred = lsr.apply(RealFeatures(Xtest.T))
mse_test_lsr = evaluator.evaluate(ypred, RegressionLabels(y))

fig = plt.figure()
ax_path = fig.add_subplot(1, 2, 1)

예제 #3

파일: regression_lars.py 프로젝트: vinodrajendran001/ASP

    lsr.train()
else:
    lsr = LeastSquaresRegression()
    lsr.set_labels(RegressionLabels(y))
    lsr.train(RealFeatures(X.T))

# gather LASSO path
path = np.zeros((p, LeastAngleRegression.get_path_size()))
for i in xrange(path.shape[1]):
    path[:, i] = LeastAngleRegression.get_w(i)

# apply on training data
mse_train = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_train.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(X.T)).get_labels()
    mse_train[i] = np.dot(ypred - y, ypred - y) / y.shape[0]
ypred = lsr.apply(RealFeatures(X.T)).get_labels()
mse_train_lsr = np.dot(ypred - y, ypred - y) / y.shape[0]

# apply on test data
mse_test = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_test.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(Xtest.T)).get_labels()
    mse_test[i] = np.dot(ypred - ytest, ypred - ytest) / ytest.shape[0]
ypred = lsr.apply(RealFeatures(Xtest.T)).get_labels()
mse_test_lsr = np.dot(ypred - ytest, ypred - ytest) / ytest.shape[0]

fig = plt.figure()
ax_path = fig.add_subplot(1, 2, 1)

예제 #4

파일: regression_lars.py 프로젝트: AlexBinder/shogun

    lsr = LeastSquaresRegression()
    lsr.set_labels(RegressionLabels(y))
    lsr.train(RealFeatures(X.T))

# gather LASSO path
path = np.zeros((p, LeastAngleRegression.get_path_size()))
for i in xrange(path.shape[1]):
    path[:,i] = LeastAngleRegression.get_w(i)

evaluator = MeanSquaredError()

# apply on training data
mse_train = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_train.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(X.T))
    mse_train[i] = evaluator.evaluate(ypred, RegressionLabels(y))
ypred = lsr.apply(RealFeatures(X.T))
mse_train_lsr = evaluator.evaluate(ypred, RegressionLabels(y))

# apply on test data
mse_test = np.zeros(LeastAngleRegression.get_path_size())
for i in xrange(mse_test.shape[0]):
    LeastAngleRegression.switch_w(i)
    ypred = LeastAngleRegression.apply(RealFeatures(Xtest.T))
    mse_test[i] = evaluator.evaluate(ypred, RegressionLabels(y))
ypred = lsr.apply(RealFeatures(Xtest.T))
mse_test_lsr = evaluator.evaluate(ypred, RegressionLabels(y))

fig = plt.figure()
ax_path = fig.add_subplot(1,2,1)