Python util.load_data函数代码示例

def main():
	# img_width, img_height = 48, 48
	img_width, img_height = 200, 60
	img_channels = 1 
	# batch_size = 1024
	batch_size = 32
	nb_epoch = 1000
	post_correction = False

	save_dir = 'save_model/' + str(datetime.now()).split('.')[0].split()[0] + '/' # model is saved corresponding to the datetime
	train_data_dir = 'train_data/ip_train/'
	# train_data_dir = 'train_data/single_1000000/'
	val_data_dir = 'train_data/ip_val/'
	test_data_dir = 'test_data//'
	weights_file_path = 'save_model/2016-10-27/weights.11-1.58.hdf5'
	char_set, char2idx = get_char_set(train_data_dir)
	nb_classes = len(char_set)
	max_nb_char = get_maxnb_char(train_data_dir)
	label_set = get_label_set(train_data_dir)
	# val 'char_set:', char_set
	print 'nb_classes:', nb_classes
	print 'max_nb_char:', max_nb_char
	print 'size_label_set:', len(label_set)
	model = build_shallow(img_channels, img_width, img_height, max_nb_char, nb_classes) # build CNN architecture
	# model.load_weights(weights_file_path) # load trained model

	val_data = load_data(val_data_dir, max_nb_char, img_width, img_height, img_channels, char_set, char2idx)
	# val_data = None 
	train_data = load_data(train_data_dir, max_nb_char, img_width, img_height, img_channels, char_set, char2idx) 
	train(model, batch_size, nb_epoch, save_dir, train_data, val_data, char_set)

def test_stacker():
    comments, dates, labels = load_data()
    clf = LogisticRegression(tol=1e-8, C=0.01, penalty='l2')
    countvect_char = TfidfVectorizer(ngram_range=(1, 5),
            analyzer="char", binary=False)
    countvect_word = TfidfVectorizer(ngram_range=(1, 3),
            analyzer="word", binary=False)
    badwords = BadWordCounter()
    select = SelectPercentile(score_func=chi2)
    char_select = Pipeline([('char_count', countvect_char),
                            ('select', select)])
    words_select = Pipeline([('word_count', countvect_word),
                             ('select', select)])
    badwords_select = Pipeline([('badwords', badwords), ('select', select)])

    stack = FeatureStacker([("badwords", badwords_select),
                            ("chars", char_select),
                            ("words", words_select)])
    #stack.fit(comments)
    #features = stack.transform(comments)

    #print("training and transforming for linear model")
    print("training grid search")
    pipeline = Pipeline([("features", stack), ("clf", clf)])
    param_grid = dict(clf__C=[0.31, 0.42, 0.54],
                      features__words__select__percentile=[5, 7])
    grid = GridSearchCV(pipeline, cv=5, param_grid=param_grid, verbose=4,
           n_jobs=1, score_func=auc_score)
    grid.fit(comments, labels)
    tracer()

def plot_conformity(name, log_dir, ax=None, legend=True):
    if ax is None:
        ax = plt.gca()

    r, actual, pred, a_err, p_err = util.load_data(name, log_dir)
    ax.errorbar(r, actual[0] - a_err[0], actual[0] + a_err[0], color=red_col,
                 label='Red centrals')
    ax.errorbar(r, actual[1] - a_err[1], actual[1] + a_err[1], color=blue_col,
                 label='Blue centrals')
    ax.errorbar(r, actual[2] - a_err[2], actual[2] + a_err[2], color='k',
                 label='All centrals')
    ax.errorbar(r, pred[0] - p_err[0], pred[0] + p_err[0], color=red_col,
                linestyle='--', alpha=0.3)
    ax.errorbar(r, pred[1] - p_err[1], pred[1] + p_err[1], color=blue_col,
                linestyle='--', alpha=0.3)
    ax.errorbar(r, pred[2] - p_err[2], pred[2] + p_err[2], color='k',
                linestyle='--', alpha=0.3)
    ax.set_xscale('log')
    ax.set_xlabel('r [Mpc/h]')
    ax.set_ylabel('Quenched Fraction')
    ax.set_ylim(0.0, 1.1)
    ax.set_xlim(0.1, 20)
    if legend:
        ax.legend(loc='best')
    return style_plots(ax)

def main():
    global k_out
    k_out = 0
    x, y = load_data(k=2)
    kf = cross_validation.KFold(len(x), n_fold)
    scaler = preprocessing.StandardScaler()
    acc, prec, recall = [], [], []
    for train, test in kf:
        x_train, x_test, y_train, y_test = x[train] , x[test] , y[train] , y[test]
        c_star, gamma_star = choose_c_gamma(x_train, y_train)
        print '=========c*:{} g*:{}'.format(c_star, gamma_star)
        scaler.fit(x_train)
        clf = svm.SVC(C=c_star, gamma=gamma_star)
        clf.fit(scaler.transform(x_train), y_train)
        y_pred = clf.predict(scaler.transform(x_test))
        acc.append(accuracy_score(y_test, y_pred))
        prec.append(precision_score(y_test, y_pred))
        recall.append(recall_score(y_test, y_pred))
        print acc
        k_out += 1
    a = np.mean(acc)
    p = np.mean(prec)
    r = np.mean(recall)
    f = 2 * p * r / (p + r)
    
    print 'precision: {}'.format(p)
    print "recall: {}".format(r)
    print "f1: {}".format(f)
    print "accuracy: {}".format(a)

def main(stat, stat_name):
    cats = util.load_all_cats()
    all_r_values = []
    names = cats.keys()
    names = ['HW', 'Becker', 'Lu', 'Henriques', 'Illustris', 'EAGLE', 'MB-II'][::-1]
    proxies = ['s1','s2','s5','s10','d1','d2','d5','d10', 'rhill', 'rhillmass']
    proxies_formatted = [ '$\Sigma_1$', '$\Sigma_2$', '$\Sigma_5$', '$\Sigma_{10}$', '$D_1$', '$D_2$', '$D_5$', '$D_{10}$', 'R$_\mathrm{hill}$', 'R$_\mathrm{hill-mass}$' ]
    for name in names:
        cat = cats[name]
        stat_dict = util.load_data('statistics.pckl', cat['dir'])
        r_values = []
        for p in proxies:
            try:
                print 'std of ', stat,' for ', p, '=', np.std(stat_dict[stat][p])
                r_values.append(np.mean(stat_dict[stat][p]))
            except:
                print 'no statistics found for', p
                r_values.append(0)
        all_r_values.append(r_values)
    df = pd.DataFrame(columns=proxies_formatted, index=names)
    for name, r_values in zip(names, all_r_values):
        df.loc[name] = pd.Series({p: v for p,v in zip(proxies_formatted, r_values)})
    #plt.imshow(all_r_values)
    #plt.show()
    df = df[df.columns].astype(float)
    #sns.heatmap(df, vmin=0,vmax=0.71, cmap='Blues', annot=True, fmt='.2f')
    #plots.style_plots()
    #plt.show()
    print df.values
    plot_heatmap(df, proxies_formatted, names, stat_name)

def main():
    global k_out
    k_out = 0
    x, y = load_data(k=2)
    kf_out = cross_validation.KFold(len(x), n_fold)
    a_score, p_score, r_score = [], [], []
    for train_out, test_out in kf_out:
        x_train_out, x_test_out, y_train_out, y_test_out = x[train_out] , x[test_out] , y[train_out] , y[test_out]
        kf = cross_validation.KFold(len(x_train_out), n_fold)
        m_opt = pruning_cross_validation(x_train_out, y_train_out, kf)
        clf = DecisionTreeClassifier(criterion='entropy', max_leaf_nodes=m_opt + 1)
        print '=========m_opt:{}'.format(m_opt)
        clf.fit(x_train_out, y_train_out)
        y_pred = clf.predict(x_test_out)
        a_score.append(accuracy_score(y_test_out, y_pred))
        p_score.append(precision_score(y_test_out, y_pred))
        r_score.append(recall_score(y_test_out, y_pred))
        k_out += 1
    a = np.mean(a_score)
    p = np.mean(p_score)
    r = np.mean(r_score)
    f = 2 * p * r / (p + r)
    print 'precision: {}'.format(p)
    print "recall: {}".format(r)
    print "f1: {}".format(f)
    print "accuracy: {}".format(a)

def bagging():
    from sklearn.feature_selection import SelectPercentile, chi2

    comments, dates, labels = load_data()
    select = SelectPercentile(score_func=chi2, percentile=4)

    clf = LogisticRegression(tol=1e-8, penalty='l2', C=7)
    #clf = BaggingClassifier(logr, n_estimators=50)
    countvect_char = TfidfVectorizer(ngram_range=(1, 5),
            analyzer="char", binary=False)
    countvect_word = TfidfVectorizer(ngram_range=(1, 3),
            analyzer="word", binary=False)
    badwords = BadWordCounter()

    ft = FeatureStacker([("badwords", badwords), ("chars", countvect_char),
        ("words", countvect_word)])
    #ft = TextFeatureTransformer()
    pipeline = Pipeline([('vect', ft), ('select', select), ('logr', clf)])

    cv = ShuffleSplit(len(comments), n_iterations=20, test_size=0.2,
            indices=True)
    scores = []
    for train, test in cv:
        X_train, y_train = comments[train], labels[train]
        X_test, y_test = comments[test], labels[test]
        pipeline.fit(X_train, y_train)
        probs = pipeline.predict_proba(X_test)
        scores.append(auc_score(y_test, probs[:, 1]))
        print("score: %f" % scores[-1])
    print(np.mean(scores), np.std(scores))

def main():
	window_size = 100
	threshold = calc_threshold(exp_moving_average, window_size)

	print threshold

	filename = sys.argv[1]
	data_in = load_data(filename)

	# Uncomment for more realistic first values. First window_size/4 values
	# should not be taken into account in the output data and plots.
	# data_in[:0] = [sum(data_in[:(window_size/4)])/(window_size/4)]

	filtered_ma = average_diff(data_in, moving_average, window_size)
	filtered_ema = average_diff(data_in, exp_moving_average, window_size)

	plot([0] * len(data_in),
	     filtered_ma,
	     filtered_ema,
	     [threshold] * len(data_in),
	     [-threshold] * len(data_in),
	     )

	mean_ma  = mean_value_detector(filtered_ma,  threshold)
	mean_ema = mean_value_detector(filtered_ema, threshold)

	plot(mean_ema)
	plot(mean_ma)

	write_data(mean_ema, filename + ".out")

 def loadText(self):
     login, password, dbname = load_data()
     self.ui.loginEdit.setText(login)
     self.ui.passwordEdit.setText(password)
     self.ui.dbEdit.setText(dbname)
     self.ui.rememberPassword.setChecked(bool(password))
     if login:
         self.ui.passwordEdit.setFocus()

def get_visitorid():
    visitor_id = util.load_data(addon, VISITOR_FILE)
    if visitor_id is False:
        from random import randint
        visitor_id = str(randint(0, 0x7fffffff))
        util.save_data(addon, VISITOR_FILE, visitor_id)

    return visitor_id

def main():
    x, y = load_data(k=2)
    kf = cross_validation.KFold(len(x), n_fold)
    a, p, r, f = classify(x, y, kf, n_estimator=50)
    print "precision: {}".format(p)
    print "recall: {}".format(r)
    print "f1: {}".format(f)
    print "accuracy: {}".format(a)

    def __init__(self, problem_path):
        A, b, N, block_sizes, x_true, nz, f = util.load_data(problem_path)

        self._A = A
        self._b = b
        self._U = util.U(block_sizes)
        self._x_true = x_true
        self._f = f
        self._N = N
        self._x0 = util.block_sizes_to_x0(block_sizes)

def main():
    x, y = load_data(k=2)
    kf = cross_validation.KFold(len(x), n_fold)
    max_m = min(2500 - 1, int(len(x) * (n_fold - 1) / n_fold) - 1)
    acc_score = [[] for i in xrange(max_m)]
    p_score = [[] for i in xrange(max_m)]
    r_score = [[] for i in xrange(max_m)]
    for train, test in kf:
        print len(train)
        x_train, x_test, y_train, y_test = x[train] , x[test] , y[train] , y[test]
        m = 1
        
        while 1: 
            print "iter: {}".format(m)
            clf = DecisionTreeClassifier(criterion='entropy', max_leaf_nodes=m + 1)
            clf.fit(x_train, y_train)
            y_pred = clf.predict(x_test)
            acc = accuracy_score(y_test, y_pred)
            acc_score[m - 1].append(acc)
            p_score[m - 1].append(precision_score(y_test, y_pred))
            r_score[m - 1].append(recall_score(y_test, y_pred))
            print 'accuracy: {}'.format(acc)
            m += 1
            if m > max_m:
                break             
#         break
    max_val, max_id = -1, -1
    for i in xrange(len(acc_score)):
        acc = np.mean(acc_score[i])
        if acc > max_val:
            max_val = acc
            max_id = i
        acc_score[i] = acc
        p_score[i] = np.mean(p_score[i])
        r_score[i] = np.mean(r_score[i])
    print acc_score[:10]
    with open('res/effect_of_leaves', 'w') as out:
        out.write(str(acc_score) + '\n')
        out.write(str(p_score) + '\n')
        out.write(str(r_score) + '\n')
    print 'splits:{}'.format(max_id + 1)
    print 'accuracy:{}'.format(max_val)
    print 'p:{}    r:{}'.format(p_score[max_id], r_score[max_id])
    
    plt.clf()
    m_idx = np.arange(2, len(acc_score) + 2)
    max_leaf = max_id + 2 
    plt.plot(m_idx, acc_score, label='cross_validation')
    plt.plot(max_leaf, max_val, linestyle='none', marker='o', markeredgecolor='r', markeredgewidth=1, markersize=12, markerfacecolor='none', label='best choice')
    plt.plot((max_leaf, max_leaf), (0, max_val), 'k--')
    plt.ylim(ymin=0.88, ymax=0.96)
    plt.xlabel("Number of leaf nodes")
    plt.ylabel("Cross validation score")
    plt.legend(numpoints=1, loc=4)
    plt.savefig('figs/effect_of_leaves.png')

def ge_cmd_predict():
	args = parse_arg_predict()

	# prepare input to GE_learn
	data = util.load_data(args.data)
	model = util.load_model(args.model)
	pred_path = args.output

	pred = GE_predict(data, model)
	util.write_prediction(pred, pred_path)
	return

 def setup_ts(self):
     cube, self.time, flux, radii, unc = load_data(self.setup['data_dir'],
         self.aor)
     pixels = get_pix(cube, geom=self.geom)
     self.t = binned(self.time, binsize=self.bs)
     self.pix = binned(pixels, binsize=self.bs)
     i = self.select_radius(flux)
     print("using radius: {}".format(radii[i]))
     self.radius = radii[i]
     self.f = binned(flux[i], binsize=self.bs)
     self.unc = binned(unc[i], binsize=self.bs) / np.sqrt(self.bs)
     self.pld = [0] * pixels.shape[1] + [0] * 2