Python datasets.load_linnerud函数代码示例

def test_load_linnerud():
    res = load_linnerud()
    assert_equal(res.data.shape, (20, 3))
    assert_equal(res.target.shape, (20, 3))
    assert_equal(len(res.target_names), 3)
    assert_true(res.DESCR)

    # test return_X_y option
    X_y_tuple = load_linnerud(return_X_y=True)
    bunch = load_linnerud()
    assert_true(isinstance(X_y_tuple, tuple))
    assert_array_equal(X_y_tuple[0], bunch.data)
    assert_array_equal(X_y_tuple[1], bunch.target)

def test_convergence_fail():
    d = load_linnerud()
    X = d.data
    Y = d.target
    pls_bynipals = pls_.PLSCanonical(n_components=X.shape[1],
                                     max_iter=2, tol=1e-10)
    assert_warns(ConvergenceWarning, pls_bynipals.fit, X, Y)

def test_pls_errors():
    d = load_linnerud()
    X = d.data
    Y = d.target
    for clf in [pls_.PLSCanonical(), pls_.PLSRegression(), pls_.PLSSVD()]:
        clf.n_components = 4
        assert_raise_message(ValueError, "Invalid number of components", clf.fit, X, Y)

def test_eigsym():

    d = load_linnerud()
    X = d.data

    n = 3
    X = dot(X.T, X)

    eig = EIGSym(num_comp = n, tolerance = 5e-12)
    eig.fit(X)
    Xhat = dot(eig.V, dot(eig.D, eig.V.T))

    assert_array_almost_equal(X, Xhat, decimal=4, err_msg="EIGSym does not" \
            " give the correct reconstruction of the matrix")

    [D,V] = np.linalg.eig(X)
    # linalg.eig does not return the eigenvalues in order, so need to sort
    idx = np.argsort(D, axis=None).tolist()[::-1]
    D = D[idx]
    V = V[:,idx]

    Xhat = dot(V, dot(np.diag(D), V.T))

    V, eig.V = direct(V, eig.V, compare = True)
    assert_array_almost_equal(V, eig.V, decimal=5, err_msg="EIGSym does not" \
            " give the correct eigenvectors")

def test_scale():

    d = load_linnerud()
    X = d.data
    Y = d.target

    # causes X[:, -1].std() to be zero
    X[:, -1] = 1.0

def test_scale():
    d = load_linnerud()
    X = d.data
    Y = d.target

    # causes X[:, -1].std() to be zero
    X[:, -1] = 1.0

    for clf in [pls.PLSCanonical(), pls.PLSRegression(), pls.CCA(), pls.PLSSVD()]:
        clf.set_params(scale=True)
        clf.fit(X, Y)

def test_PLSSVD():
    # Let's check the PLSSVD doesn't return all possible component but just
    # the specified number
    d = load_linnerud()
    X = d.data
    Y = d.target
    n_components = 2
    for clf in [pls_.PLSSVD, pls_.PLSRegression, pls_.PLSCanonical]:
        pls = clf(n_components=n_components)
        pls.fit(X, Y)
        assert_equal(n_components, pls.y_scores_.shape[1])

def test_univariate_pls_regression():
    # Ensure 1d Y is correctly interpreted
    d = load_linnerud()
    X = d.data
    Y = d.target

    clf = pls_.PLSRegression()
    # Compare 1d to column vector
    model1 = clf.fit(X, Y[:, 0]).coef_
    model2 = clf.fit(X, Y[:, :1]).coef_
    assert_array_almost_equal(model1, model2)

def test_load_linnerud():
    res = load_linnerud()
    assert_equal(res.data.shape, (20, 3))
    assert_equal(res.target.shape, (20, 3))
    assert_equal(len(res.target_names), 3)
    assert_true(res.DESCR)
    assert_true(os.path.exists(res.data_filename))
    assert_true(os.path.exists(res.target_filename))

    # test return_X_y option
    check_return_X_y(res, partial(load_linnerud))

def test_scale_and_stability():
    # We test scale=True parameter
    # This allows to check numerical stability over platforms as well

    d = load_linnerud()
    X1 = d.data
    Y1 = d.target
    # causes X[:, -1].std() to be zero
    X1[:, -1] = 1.0

    # From bug #2821
    # Test with X2, T2 s.t. clf.x_score[:, 1] == 0, clf.y_score[:, 1] == 0
    # This test robustness of algorithm when dealing with value close to 0
    X2 = np.array([[0., 0., 1.],
                   [1., 0., 0.],
                   [2., 2., 2.],
                   [3., 5., 4.]])
    Y2 = np.array([[0.1, -0.2],
                   [0.9, 1.1],
                   [6.2, 5.9],
                   [11.9, 12.3]])

    for (X, Y) in [(X1, Y1), (X2, Y2)]:
        X_std = X.std(axis=0, ddof=1)
        X_std[X_std == 0] = 1
        Y_std = Y.std(axis=0, ddof=1)
        Y_std[Y_std == 0] = 1

        X_s = (X - X.mean(axis=0)) / X_std
        Y_s = (Y - Y.mean(axis=0)) / Y_std

        for clf in [CCA(), pls_.PLSCanonical(), pls_.PLSRegression(),
                    pls_.PLSSVD()]:
            clf.set_params(scale=True)
            X_score, Y_score = clf.fit_transform(X, Y)
            clf.set_params(scale=False)
            X_s_score, Y_s_score = clf.fit_transform(X_s, Y_s)
            assert_array_almost_equal(X_s_score, X_score)
            assert_array_almost_equal(Y_s_score, Y_score)
            # Scaling should be idempotent
            clf.set_params(scale=True)
            X_score, Y_score = clf.fit_transform(X_s, Y_s)
            assert_array_almost_equal(X_s_score, X_score)
            assert_array_almost_equal(Y_s_score, Y_score)

    def load_linnerud():
        from sklearn.datasets import load_linnerud
        linnerud = load_linnerud()

        # print(linnerud.DESCR)

        print(linnerud.keys())

        # print(linnerud.feature_names)
        # Chins     : 懸垂の回数
        # Situps    : 腹筋の回数
        # Jumps     : 跳躍

        # print(linnerud.target_names)
        # ['Weight', 'Waist', 'Pulse']

        X = linnerud.data
        y = linnerud.target
        return SklearnDataGenerator.shuffle(X, y)

def test_predict_transform_copy():
    # check that the "copy" keyword works
    d = load_linnerud()
    X = d.data
    Y = d.target
    clf = pls_.PLSCanonical()
    X_copy = X.copy()
    Y_copy = Y.copy()
    clf.fit(X, Y)
    # check that results are identical with copy
    assert_array_almost_equal(clf.predict(X), clf.predict(X.copy(), copy=False))
    assert_array_almost_equal(clf.transform(X), clf.transform(X.copy(), copy=False))

    # check also if passing Y
    assert_array_almost_equal(clf.transform(X, Y), clf.transform(X.copy(), Y.copy(), copy=False))
    # check that copy doesn't destroy
    # we do want to check exact equality here
    assert_array_equal(X_copy, X)
    assert_array_equal(Y_copy, Y)
    # also check that mean wasn't zero before (to make sure we didn't touch it)
    assert_true(np.all(X.mean(axis=0) != 0))

def scikitAlgorithms_UCIDataset(input_dict):
    from sklearn import datasets
    allDSets = {"iris":datasets.load_iris(), "boston":datasets.load_boston(), "diabetes":datasets.load_diabetes(), " linnerud":datasets.load_linnerud()}
    dataset = allDSets[input_dict['dsIn']]
    output_dict = {}
    output_dict['dtsOut'] = dataset#(dataset.data, dataset.target)
    return output_dict

def test_pls():
    d = load_linnerud()
    X = d.data
    Y = d.target
    # 1) Canonical (symmetric) PLS (PLS 2 blocks canonical mode A)
    # ===========================================================
    # Compare 2 algo.: nipals vs. svd
    # ------------------------------
    pls_bynipals = pls_.PLSCanonical(n_components=X.shape[1])
    pls_bynipals.fit(X, Y)
    pls_bysvd = pls_.PLSCanonical(algorithm="svd", n_components=X.shape[1])
    pls_bysvd.fit(X, Y)
    # check equalities of loading (up to the sign of the second column)
    assert_array_almost_equal(
        pls_bynipals.x_loadings_,
        pls_bysvd.x_loadings_, decimal=5,
        err_msg="nipals and svd implementations lead to different x loadings")

    assert_array_almost_equal(
        pls_bynipals.y_loadings_,
        pls_bysvd.y_loadings_, decimal=5,
        err_msg="nipals and svd implementations lead to different y loadings")

    # Check PLS properties (with n_components=X.shape[1])
    # ---------------------------------------------------
    plsca = pls_.PLSCanonical(n_components=X.shape[1])
    plsca.fit(X, Y)
    T = plsca.x_scores_
    P = plsca.x_loadings_
    Wx = plsca.x_weights_
    U = plsca.y_scores_
    Q = plsca.y_loadings_
    Wy = plsca.y_weights_

    def check_ortho(M, err_msg):
        K = np.dot(M.T, M)
        assert_array_almost_equal(K, np.diag(np.diag(K)), err_msg=err_msg)

    # Orthogonality of weights
    # ~~~~~~~~~~~~~~~~~~~~~~~~
    check_ortho(Wx, "x weights are not orthogonal")
    check_ortho(Wy, "y weights are not orthogonal")

    # Orthogonality of latent scores
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    check_ortho(T, "x scores are not orthogonal")
    check_ortho(U, "y scores are not orthogonal")

    # Check X = TP' and Y = UQ' (with (p == q) components)
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    # center scale X, Y
    Xc, Yc, x_mean, y_mean, x_std, y_std =\
        pls_._center_scale_xy(X.copy(), Y.copy(), scale=True)
    assert_array_almost_equal(Xc, np.dot(T, P.T), err_msg="X != TP'")
    assert_array_almost_equal(Yc, np.dot(U, Q.T), err_msg="Y != UQ'")

    # Check that rotations on training data lead to scores
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Xr = plsca.transform(X)
    assert_array_almost_equal(Xr, plsca.x_scores_,
                              err_msg="rotation on X failed")
    Xr, Yr = plsca.transform(X, Y)
    assert_array_almost_equal(Xr, plsca.x_scores_,
                              err_msg="rotation on X failed")
    assert_array_almost_equal(Yr, plsca.y_scores_,
                              err_msg="rotation on Y failed")

    # "Non regression test" on canonical PLS
    # --------------------------------------
    # The results were checked against the R-package plspm
    pls_ca = pls_.PLSCanonical(n_components=X.shape[1])
    pls_ca.fit(X, Y)

    x_weights = np.array(
        [[-0.61330704,  0.25616119, -0.74715187],
         [-0.74697144,  0.11930791,  0.65406368],
         [-0.25668686, -0.95924297, -0.11817271]])
    # x_weights_sign_flip holds columns of 1 or -1, depending on sign flip
    # between R and python
    x_weights_sign_flip = pls_ca.x_weights_ / x_weights

    x_rotations = np.array(
        [[-0.61330704,  0.41591889, -0.62297525],
         [-0.74697144,  0.31388326,  0.77368233],
         [-0.25668686, -0.89237972, -0.24121788]])
    x_rotations_sign_flip = pls_ca.x_rotations_ / x_rotations

    y_weights = np.array(
        [[+0.58989127,  0.7890047,   0.1717553],
         [+0.77134053, -0.61351791,  0.16920272],
         [-0.23887670, -0.03267062,  0.97050016]])
    y_weights_sign_flip = pls_ca.y_weights_ / y_weights

    y_rotations = np.array(
        [[+0.58989127,  0.7168115,  0.30665872],
         [+0.77134053, -0.70791757,  0.19786539],
         [-0.23887670, -0.00343595,  0.94162826]])
    y_rotations_sign_flip = pls_ca.y_rotations_ / y_rotations

    # x_weights = X.dot(x_rotation)
#.........这里部分代码省略.........

# coding=utf-8

from sklearn import datasets
import numpy as np
import matplotlib.pyplot as plt

d1 = datasets.load_iris() #
d2 = datasets.load_breast_cancer() #乳腺癌数据
d3 = datasets.load_digits() #手写数字
d4 = datasets.load_boston() #波士顿房价
d5 = datasets.load_linnerud() #体能数据集


print(d3.keys())
samples,features = d3.data.shape
print(samples,features)
print(d3.images.shape)

#print(d1.data)
#print(d1.target)
print(d3.target_names)

print(np.bincount(d1.target))

x_index = 3
colors = ['blue','red','green']

'''
for label,color in zip(range(len(d1.target_names)),colors):
    plt.hist(d1.data[d1.target==label,x_index],label=d1.target_names[label],color=color) #直方图