def read_file(): file_content = pd.read_csv('train.csv') exc_cols = [u'Id', u'Response'] cols = [c for c in file_content.columns if c not in exc_cols] train_datas = file_content.ix[:, cols] train_lables = file_content['Response'].values test_file = pd.read_csv('test.csv') test_ids = test_file['Id'].values test_datas = test_file.ix[:, [c for c in test_file.columns if c not in [u'Id']]] # 填充平均值 test_datas = test_datas.fillna(-1) train_datas = train_datas.fillna(-1) all_datas = pd.concat([train_datas, test_datas], axis=0) # 对数据进行一下划分 categoricalVariables = ["Product_Info_1", "Product_Info_2", "Product_Info_3", "Product_Info_5", "Product_Info_6", "Product_Info_7", "Employment_Info_2", "Employment_Info_3", "Employment_Info_5", "InsuredInfo_1", "InsuredInfo_2", "InsuredInfo_3", "InsuredInfo_4", "InsuredInfo_5", "InsuredInfo_6", "InsuredInfo_7", "Insurance_History_1", "Insurance_History_2", "Insurance_History_3", "Insurance_History_4", "Insurance_History_7", "Insurance_History_8", "Insurance_History_9", "Family_Hist_1", "Medical_History_2", "Medical_History_3", "Medical_History_4", "Medical_History_5", "Medical_History_6", "Medical_History_7", "Medical_History_8", "Medical_History_9", "Medical_History_10", "Medical_History_11", "Medical_History_12", "Medical_History_13", "Medical_History_14", "Medical_History_16", "Medical_History_17", "Medical_History_18", "Medical_History_19", "Medical_History_20", "Medical_History_21", "Medical_History_22", "Medical_History_23", "Medical_History_25", "Medical_History_26", "Medical_History_27", "Medical_History_28", "Medical_History_29", "Medical_History_30", "Medical_History_31", "Medical_History_33", "Medical_History_34", "Medical_History_35", "Medical_History_36", "Medical_History_37", "Medical_History_38", "Medical_History_39", "Medical_History_40", "Medical_History_41"] all_file_data = all_datas.ix[:, [c for c in all_datas.columns if c not in categoricalVariables]] all_file_cate = all_datas.ix[:, [c for c in categoricalVariables]] # 归一化 对数值数据 scalar_this = StandardScaler() scalar_this.fit_transform(all_file_data) # 重新组合数据 train_datas = pd.concat([all_file_data[:train_datas.shape[0]], all_file_cate[:train_datas.shape[0]]], axis=1) test_datas = pd.concat([all_file_data[file_content.shape[0]:], all_file_cate[file_content.shape[0]:]], axis=1) # 向量化 train_datas = DictVectorizer().fit_transform(train_datas.to_dict(outtype='records')).toarray() test_datas = DictVectorizer().fit_transform(test_datas.to_dict(outtype='records')).toarray() return (train_datas, train_lables, test_ids, test_datas)
def boston_DBSCAN(class_num=0): '''给出Boston房价数据集中class_num类,数据形式为归一化数据列 :parameter ———— class_num:类号,读取函数所返回的类别号 :returns ———— x_boston:波士顿数据集中class_num类的自变量,归一化数据列,共13列 y_boston:波士顿数据集中class_num类自变量,归一化数据列,共1列 ''' # 读取全数据集 bostondata = load_boston() boston_X = bostondata.data boston_y = bostondata.target boston_full = np.c_[boston_X, boston_y] # 进行全数据集归一化 scale = StandardScaler() boston_full = scale.fit_transform(boston_full) # 数据集降维为3维,方便可视化调参。 pca = PCA(n_components=3) boston_full3 = pca.fit_transform(boston_full) # 分类 clt = DBSCAN(eps=0.8, min_samples=5, n_jobs=4) label3 = clt.fit_predict(X=boston_full3) # 给定输出数据 group0_boston = boston_full[label3 == 0] x_boston = group0_boston[:, 0:-2] y_boston = group0_boston[:, -1] return x_boston, y_boston
def load_UCI_Credit_Card_data(infile=None, balanced=True, seed=5): X = [] y = [] sids = [] with open(infile, "r") as fi: fi.readline() reader = csv.reader(fi) for row in reader: sids.append(row[0]) X.append(row[1:-1]) y0 = int(row[-1]) if y0 == 0: y0 = -1 y.append(y0) y = np.array(y) if balanced: X, y = balance_X_y(X, y, seed) X = np.array(X, dtype=np.float32) y = np.array(y, dtype=np.float32) encoder = OneHotEncoder(categorical_features=[1, 2, 3]) encoder.fit(X) X = encoder.transform(X).toarray() X, y = shuffle_X_y(X, y, seed) scale_model = StandardScaler() X = scale_model.fit_transform(X) return X, np.expand_dims(y, axis=1)
def get_data(args, logger, debug): '''Get data.''' # Get data: train_data, val_data, test_data = _get_data(args, logger) debug(f'train size = {len(train_data):,} | val size = {len(val_data):,} |' f' test size = {len(test_data):,}') if args.dataset_type == 'classification': class_sizes = get_class_sizes(args.data_df) debug('Class sizes') debug(class_sizes) # Scale features: if args.features_scaling: features_scaler = train_data.normalize_features() val_data.normalize_features(features_scaler) test_data.normalize_features(features_scaler) else: features_scaler = None # Initialise scaler and scale training targets by subtracting mean and # dividing standard deviation (regression only): if args.dataset_type == 'regression': debug('Fitting scaler') scaler = StandardScaler() targets = scaler.fit_transform(train_data.targets()) train_data.set_targets(targets) else: scaler = None return train_data, val_data, test_data, scaler, features_scaler
def NUS_WIDE_load_three_party_data(data_dir, selected_labels, neg_label=-1, n_samples=-1): print("# load_three_party_data") Xa, Xb, Xc, y = get_labeled_data_with_3_party( data_dir=data_dir, selected_labels=selected_labels, n_samples=n_samples) scale_model = StandardScaler() Xa = scale_model.fit_transform(Xa) Xb = scale_model.fit_transform(Xb) Xc = scale_model.fit_transform(Xc) y_ = [] pos_count = 0 neg_count = 0 for i in range(y.shape[0]): # the first label in y as the first class while the other labels as the second class if y[i, 0] == 1: y_.append(1) pos_count += 1 else: y_.append(neg_label) neg_count += 1 print("pos counts:", pos_count) print("neg counts:", neg_count) y = np.expand_dims(y_, axis=1) n_train = int(0.8 * Xa.shape[0]) Xa_train, Xb_train, Xc_train = Xa[:n_train], Xb[:n_train], Xc[:n_train] Xa_test, Xb_test, Xc_test = Xa[n_train:], Xb[n_train:], Xc[n_train:] y_train, y_test = y[:n_train], y[n_train:] print("Xa_train.shape:", Xa_train.shape) print("Xb_train.shape:", Xb_train.shape) print("Xc_train.shape:", Xc_train.shape) print("Xa_test.shape:", Xa_test.shape) print("Xb_test.shape:", Xb_test.shape) print("Xc_test.shape:", Xc_test.shape) print("y_train.shape:", y_train.shape) print("y_test.shape:", y_test.shape) return [Xa_train, Xb_train, Xc_train, y_train], [Xa_test, Xb_test, Xc_test, y_test]
def test_scaler_without_centering(): rng = np.random.RandomState(42) X = rng.randn(4, 5) X[:, 0] = 0.0 # first feature is always of zero X_csr = sparse.csr_matrix(X) X_csc = sparse.csc_matrix(X) assert_raises(ValueError, StandardScaler().fit, X_csr) null_transform = StandardScaler(with_mean=False, with_std=False, copy=True) X_null = null_transform.fit_transform(X_csr) assert_array_equal(X_null.data, X_csr.data) X_orig = null_transform.inverse_transform(X_null) assert_array_equal(X_orig.data, X_csr.data) scaler = StandardScaler(with_mean=False).fit(X) X_scaled = scaler.transform(X, copy=True) assert_false(np.any(np.isnan(X_scaled))) scaler_csr = StandardScaler(with_mean=False).fit(X_csr) X_csr_scaled = scaler_csr.transform(X_csr, copy=True) assert_false(np.any(np.isnan(X_csr_scaled.data))) scaler_csc = StandardScaler(with_mean=False).fit(X_csc) X_csc_scaled = scaler_csr.transform(X_csc, copy=True) assert_false(np.any(np.isnan(X_csc_scaled.data))) assert_equal(scaler.mean_, scaler_csr.mean_) assert_array_almost_equal(scaler.std_, scaler_csr.std_) assert_equal(scaler.mean_, scaler_csc.mean_) assert_array_almost_equal(scaler.std_, scaler_csc.std_) assert_array_almost_equal(X_scaled.mean(axis=0), [0., -0.01, 2.24, -0.35, -0.78], 2) assert_array_almost_equal(X_scaled.std(axis=0), [0., 1., 1., 1., 1.]) X_csr_scaled_mean, X_csr_scaled_std = mean_variance_axis0(X_csr_scaled) assert_array_almost_equal(X_csr_scaled_mean, X_scaled.mean(axis=0)) assert_array_almost_equal(X_csr_scaled_std, X_scaled.std(axis=0)) # Check that X has not been modified (copy) assert_true(X_scaled is not X) assert_true(X_csr_scaled is not X_csr) X_scaled_back = scaler.inverse_transform(X_scaled) assert_true(X_scaled_back is not X) assert_true(X_scaled_back is not X_scaled) assert_array_almost_equal(X_scaled_back, X) X_csr_scaled_back = scaler_csr.inverse_transform(X_csr_scaled) assert_true(X_csr_scaled_back is not X_csr) assert_true(X_csr_scaled_back is not X_csr_scaled) assert_array_almost_equal(X_csr_scaled_back.toarray(), X) X_csc_scaled_back = scaler_csr.inverse_transform(X_csc_scaled.tocsc()) assert_true(X_csc_scaled_back is not X_csc) assert_true(X_csc_scaled_back is not X_csc_scaled) assert_array_almost_equal(X_csc_scaled_back.toarray(), X)
def test_scaler_without_centering(): rng = np.random.RandomState(42) X = rng.randn(4, 5) X[:, 0] = 0.0 # first feature is always of zero X_csr = sparse.csr_matrix(X) X_csc = sparse.csc_matrix(X) assert_raises(ValueError, StandardScaler().fit, X_csr) null_transform = StandardScaler(with_mean=False, with_std=False, copy=True) X_null = null_transform.fit_transform(X_csr) assert_array_equal(X_null.data, X_csr.data) X_orig = null_transform.inverse_transform(X_null) assert_array_equal(X_orig.data, X_csr.data) scaler = StandardScaler(with_mean=False).fit(X) X_scaled = scaler.transform(X, copy=True) assert_false(np.any(np.isnan(X_scaled))) scaler_csr = StandardScaler(with_mean=False).fit(X_csr) X_csr_scaled = scaler_csr.transform(X_csr, copy=True) assert_false(np.any(np.isnan(X_csr_scaled.data))) scaler_csc = StandardScaler(with_mean=False).fit(X_csc) X_csc_scaled = scaler_csr.transform(X_csc, copy=True) assert_false(np.any(np.isnan(X_csc_scaled.data))) assert_equal(scaler.mean_, scaler_csr.mean_) assert_array_almost_equal(scaler.std_, scaler_csr.std_) assert_equal(scaler.mean_, scaler_csc.mean_) assert_array_almost_equal(scaler.std_, scaler_csc.std_) assert_array_almost_equal( X_scaled.mean(axis=0), [0., -0.01, 2.24, -0.35, -0.78], 2) assert_array_almost_equal(X_scaled.std(axis=0), [0., 1., 1., 1., 1.]) X_csr_scaled_mean, X_csr_scaled_std = mean_variance_axis0(X_csr_scaled) assert_array_almost_equal(X_csr_scaled_mean, X_scaled.mean(axis=0)) assert_array_almost_equal(X_csr_scaled_std, X_scaled.std(axis=0)) # Check that X has not been modified (copy) assert_true(X_scaled is not X) assert_true(X_csr_scaled is not X_csr) X_scaled_back = scaler.inverse_transform(X_scaled) assert_true(X_scaled_back is not X) assert_true(X_scaled_back is not X_scaled) assert_array_almost_equal(X_scaled_back, X) X_csr_scaled_back = scaler_csr.inverse_transform(X_csr_scaled) assert_true(X_csr_scaled_back is not X_csr) assert_true(X_csr_scaled_back is not X_csr_scaled) assert_array_almost_equal(X_csr_scaled_back.toarray(), X) X_csc_scaled_back = scaler_csr.inverse_transform(X_csc_scaled.tocsc()) assert_true(X_csc_scaled_back is not X_csc) assert_true(X_csc_scaled_back is not X_csc_scaled) assert_array_almost_equal(X_csc_scaled_back.toarray(), X)
def main(): args = parse() n_rollout = args.nrollout n_epoch = args.epoch savename = args.savename if args.savename is not None else 'model-' + str( n_rollout) + 'unroll' np.random.seed(1098) path = args.filename names = ['target_pos', 'target_speed', 'pos', 'vel', 'effort'] with h5py.File(path, 'r') as f: (target_pos, target_speed, pos, vel, effort) = [[np.array(val) for val in f[name].values()] for name in names] x_target = np.array(target_pos) x_first = np.array([pos_[0] for pos_ in pos]) x_speed = np.array(target_speed).reshape((-1, 1)) aux_output = [np.ones(eff.shape[0]).reshape((-1, 1)) for eff in effort] x = np.concatenate((x_target, x_first, x_speed), axis=1) input_scaler = StandardScaler() x = input_scaler.fit_transform(x) output_scaler = StandardScaler() effort_concat = np.concatenate([a for a in effort], axis=0) output_scaler.fit(effort_concat) effort = [output_scaler.transform(eff) for eff in effort] y = pad_sequences(effort, padding='post', value=0.) aux_output = pad_sequences(aux_output, padding='post', value=0.) x, x_test, y, y_test, y_aux, y_aux_test = train_test_split(x, y, aux_output, test_size=0.2) y_mask, y_test_mask = [this_y[:, :, 0] for this_y in (y_aux, y_aux_test)] y_aux_mask, y_aux_test_mask = [ np.ones(this_y.shape[:2]) for this_y in (y_aux, y_aux_test) ] model = MyModel(train=[x, [y, y_aux]], val=[x_test, [y_test, y_aux_test]], train_mask=[y_mask, y_aux_mask], val_mask=[y_test_mask, y_aux_test_mask], max_unroll=n_rollout, name=savename) if not os.path.exists('save'): os.makedirs('save') if args.train: model.fit(nb_epoch=n_epoch, batch_size=32) elif args.resume: model.resume(nb_epoch=n_epoch, batch_size=32)
def evalOne(parameters): all_obs = [] all_pred = [] for location in locations: trainX, testX, trainY, testY = splitDataForXValidation(location, "location", data, all_features, "target") normalizer_X = StandardScaler() trainX = normalizer_X.fit_transform(trainX) testX = normalizer_X.transform(testX) normalizer_Y = StandardScaler() trainY = normalizer_Y.fit_transform(trainY) testY = normalizer_Y.transform(testY) model = BaggingRegressor(base_estimator=SVR(kernel='rbf', C=parameters["C"], cache_size=5000), max_samples=parameters["max_samples"],n_estimators=parameters["n_estimators"], verbose=0, n_jobs=-1) model.fit(trainX, trainY) prediction = model.predict(testX) prediction = normalizer_Y.inverse_transform(prediction) testY = normalizer_Y.inverse_transform(testY) all_obs.extend(testY) all_pred.extend(prediction) return rmseEval(all_obs, all_pred)[1]
def test_scalar(): from sklearn.preprocessing.data import MinMaxScaler, StandardScaler scalar = StandardScaler() training = pd.read_csv(TRAIN_FEATURES_CSV, nrows=200000) test = pd.read_csv(TEST_FEATURES_CSV) # normalize the values for column in TOTAL_TRAINING_FEATURE_COLUMNS: training[column] = scalar.fit_transform(training[column]) test[column] = scalar.transform(test[column])
def evalOne(parameters): all_obs = [] all_pred = [] for location in locations: trainX, testX, trainY, testY = splitDataForXValidation( location, "location", data, all_features, "target") normalizer_X = StandardScaler() trainX = normalizer_X.fit_transform(trainX) testX = normalizer_X.transform(testX) normalizer_Y = StandardScaler() trainY = normalizer_Y.fit_transform(trainY) testY = normalizer_Y.transform(testY) layers = [] for _ in range(0, parameters["hidden_layers"]): layers.append( Layer(parameters["hidden_type"], units=parameters["hidden_neurons"])) layers.append(Layer("Linear")) model = Regressor(layers=layers, learning_rate=parameters["learning_rate"], n_iter=parameters["iteration"], random_state=42) X = np.array(trainX) y = np.array(trainY) model.fit(X, y) model.fit(trainX, trainY) prediction = model.predict(testX) prediction = normalizer_Y.inverse_transform(prediction) testY = normalizer_Y.inverse_transform(testY) print("location: " + str(location) + " -> " + str(rmseEval(prediction, testY)[1])) all_obs.extend(testY) all_pred.extend(prediction) return rmseEval(all_obs, all_pred)[1]
def retrieve_data(undersampling=False, ratio=1, random_state=None): ## Getting and reading csv-data files into a pandas dataframe path = os.path.dirname(os.path.realpath(__file__)) file1 = path + "/../data/creditcard_part1.csv" file2 = path + "/../data/creditcard_part2.csv" df1 = pd.read_csv(file1) df2 = pd.read_csv(file2) df = pd.concat((df1, df2), ignore_index=True) ## Finding the class balances class_counts = df.Class.value_counts() num_fraudulent = class_counts[1] num_non_fraudulent = class_counts[0] ## Splitting the dataset into design matrix X and targets y X = df.loc[:, df.columns != 'Class'].values y = df.loc[:, df.columns == 'Class'].values.ravel() #### StandardScaler is more useful for classification, and Normalizer is more useful for regression. standard_scaler = StandardScaler() X = standard_scaler.fit_transform(X) ### Undersampling to fix imbalanced class if undersampling: if random_state is not None: np.random.seed(random_state) if ratio > 1: raise ValueError("Undersampling ratio can't be larger than one") multiplier = int(1.0 / ratio) ## Randomized undersampling method indices_nonfraud = np.where(y == 0)[0] indices_fraud = np.where(y == 1)[0] np.random.shuffle(indices_nonfraud) indices_nonfraud_under = indices_nonfraud[:multiplier * num_fraudulent] indices_under = np.concatenate((indices_fraud, indices_nonfraud_under)) np.random.shuffle(indices_under) ## Using indices from undersampling method to create new balanced dataset X_under = X[indices_under] y_under = y[indices_under] ## Splitting the dataset into test and training sets X_train, X_test, y_train, y_test = train_test_split(X_under, y_under, test_size=0.33, random_state=4) return X_train, X_test, y_train, y_test
def _proccess_input(self, target_pos, target_speed, pos, vel, effort): x_target = np.array(target_pos) x_first = np.array([pos_[0] for pos_ in pos]) x_speed = np.array(target_speed).reshape((-1, 1)) aux_output = [np.ones(eff.shape[0]).reshape((-1, 1)) for eff in effort] x = np.concatenate((x_target, x_first, x_speed), axis=1) input_scaler = StandardScaler() x = input_scaler.fit_transform(x) output_scaler = StandardScaler() effort_concat = np.concatenate([a for a in effort], axis=0) output_scaler.fit(effort_concat) effort = [output_scaler.transform(eff) for eff in effort] y = pad_sequences(effort, padding='post', value=0.) aux_output = pad_sequences(aux_output, padding='post', value=0.) x, x_test, y, y_test, y_aux, y_aux_test = train_test_split(x, y, aux_output, test_size=0.2) return x, x_test, y, y_test, y_aux, y_aux_test
def test_iris(self): train_X, test_X, train_y, test_y = data_io.get_iris_train_test() print("train_X's shape = %s, train_y's shape = %s" % (train_X.shape, train_y.shape)) print("test_X's shape = %s, test_y's shape = %s" % (test_X.shape, test_y.shape)) print("Applying standard scaling ...") scaler = StandardScaler() train_X = scaler.fit_transform(train_X) test_X = scaler.transform(test_X) # train_X = test_X = np.array([[0, 0], [0, 1], [1, 0], [1, 1]]) # train_y = test_y = np.array([0, 1, 1, 0]) # train_X = test_X = np.array([[0], [1]]) # train_y = test_y = np.array([0, 1]) layers = [100] clf = MLPClassifier(layers, batch_size=train_X.shape[0], n_epochs=100, learning_rate=0.1) print("clf: %s" % clf) print("Fitting ...") clf.fit(train_X, train_y) print("Predicting ...") pred_y = clf.predict(test_X) print("y = %s" % test_y) print("pred_y = \n%s" % pred_y) # pred_proba_y = clf.predict_proba(test_X) # print("pred_proba_y = \n%s" % pred_proba_y) accuracy = accuracy_score(test_y, pred_y) print("Accuracy = %g%%" % (100 * accuracy)) self.assertGreaterEqual(accuracy, 0.89)
def test_scaler_int(): # test that scaler converts integer input to floating # for both sparse and dense matrices rng = np.random.RandomState(42) X = rng.randint(20, size=(4, 5)) X[:, 0] = 0 # first feature is always of zero X_csr = sparse.csr_matrix(X) X_csc = sparse.csc_matrix(X) null_transform = StandardScaler(with_mean=False, with_std=False, copy=True) with warnings.catch_warnings(record=True): X_null = null_transform.fit_transform(X_csr) assert_array_equal(X_null.data, X_csr.data) X_orig = null_transform.inverse_transform(X_null) assert_array_equal(X_orig.data, X_csr.data) with warnings.catch_warnings(record=True): scaler = StandardScaler(with_mean=False).fit(X) X_scaled = scaler.transform(X, copy=True) assert_false(np.any(np.isnan(X_scaled))) with warnings.catch_warnings(record=True): scaler_csr = StandardScaler(with_mean=False).fit(X_csr) X_csr_scaled = scaler_csr.transform(X_csr, copy=True) assert_false(np.any(np.isnan(X_csr_scaled.data))) with warnings.catch_warnings(record=True): scaler_csc = StandardScaler(with_mean=False).fit(X_csc) X_csc_scaled = scaler_csr.transform(X_csc, copy=True) assert_false(np.any(np.isnan(X_csc_scaled.data))) assert_equal(scaler.mean_, scaler_csr.mean_) assert_array_almost_equal(scaler.std_, scaler_csr.std_) assert_equal(scaler.mean_, scaler_csc.mean_) assert_array_almost_equal(scaler.std_, scaler_csc.std_) assert_array_almost_equal( X_scaled.mean(axis=0), [0., 1.109, 1.856, 21., 1.559], 2) assert_array_almost_equal(X_scaled.std(axis=0), [0., 1., 1., 1., 1.]) X_csr_scaled_mean, X_csr_scaled_std = mean_variance_axis0( X_csr_scaled.astype(np.float)) assert_array_almost_equal(X_csr_scaled_mean, X_scaled.mean(axis=0)) assert_array_almost_equal(X_csr_scaled_std, X_scaled.std(axis=0)) # Check that X has not been modified (copy) assert_true(X_scaled is not X) assert_true(X_csr_scaled is not X_csr) X_scaled_back = scaler.inverse_transform(X_scaled) assert_true(X_scaled_back is not X) assert_true(X_scaled_back is not X_scaled) assert_array_almost_equal(X_scaled_back, X) X_csr_scaled_back = scaler_csr.inverse_transform(X_csr_scaled) assert_true(X_csr_scaled_back is not X_csr) assert_true(X_csr_scaled_back is not X_csr_scaled) assert_array_almost_equal(X_csr_scaled_back.toarray(), X) X_csc_scaled_back = scaler_csr.inverse_transform(X_csc_scaled.tocsc()) assert_true(X_csc_scaled_back is not X_csc) assert_true(X_csc_scaled_back is not X_csc_scaled) assert_array_almost_equal(X_csc_scaled_back.toarray(), X)
def main(): df = load_train_data() logger.info('column hash = %d', utils.column_hash(df)) df = preprocess.drop_column(df, 'fullVisitorId') df = preprocess.drop_column(df, 'sessionId') # debug_info(df) y = df['totals_transactionRevenue'] X = preprocess.drop_column(df, 'totals_transactionRevenue') # X, _, y, _ = utils.split_data(X, y, ratio=0.9, seed=42) # n_classes = 10 n_models = 100 y_max = y.max() for i in range(n_models): X_train, X_test, y_train, y_test = utils.split_data(X, y) logger.info('training') # y_train, quants = preprocess.make_class_target(y_train, n_classes) # logger.info('y_train.unique() = %s', y_train.unique()) # logger.info('quants = %s', quants) # y_train = preprocess.make_class_target2(y_train, y_max, n_classes) scaler = StandardScaler() X_train = scaler.fit_transform(X_train) logger.info('X_train.shape = %s', X_train.shape) # cumulative = np.cumsum(pca.explained_variance_ratio_) # pylab.plot(cumulative, 'r-') # pylab.show() # model = build_classifier(X_train.shape[1], n_classes) model = build_regressor(X_train.shape[1]) EPOCHS = 100 early_stop = tf.keras.callbacks.EarlyStopping(monitor='val_loss', patience=5) history = model.fit(X_train, y_train, epochs=EPOCHS, validation_split=0.1, verbose=0, callbacks=[early_stop, utils.EpochCallback()]) linear_model = LinearRegression() linear_model.fit(X_train, y_train) logger.info('predicting') logger.info('X_test.shape = %s', X_test.shape) X_test = scaler.transform(X_test) # y_classes = model.predict(X_test) # y_pred = postprocess.make_real_predictions(y_classes, quants) # y_pred = postprocess.make_real_predictions2(y_classes, y_max) y_pred = model.predict(X_test).flatten() y_linear_pred = linear_model.predict(X_test) rms = np.sqrt(mean_squared_error(y_test, y_pred)) linear_rms = np.sqrt(mean_squared_error(y_test, y_linear_pred)) logger.info('rms = %s', rms) logger.info('linear_rms = %s', linear_rms) # save_model(model, i, quants, scaler) save_model2(model, linear_model, i, y_max, scaler) # plot_history_classifier(history) plot_history_regressor(history) pylab.figure() pylab.scatter(y_pred, y_test, alpha=0.5) pylab.xlabel("pred") pylab.ylabel("test") hist_revenue(y_linear_pred, 'y_linear_pred') hist_revenue(y_pred, 'y_pred') hist_revenue(y_test, 'y_test') pylab.show()
columns = [] loadData("/data/york_hour_2013.csv", ["timestamp", "atc"], data, columns) all_features = deepcopy(columns) all_features.remove("target") all_features.remove("location") output = open(OUTPUT_DATA_FILE, 'w') output.write("location,observation,prediction\n") for location in locations: print(str(location)) trainX, testX, trainY, testY = splitDataForXValidation( location, "location", data, all_features, "target") normalizer_X = StandardScaler() trainX = normalizer_X.fit_transform(trainX) testX = normalizer_X.transform(testX) normalizer_Y = StandardScaler() trainY = normalizer_Y.fit_transform(trainY) testY = normalizer_Y.transform(testY) model = BaggingRegressor(base_estimator=SVR(kernel='rbf', C=40, cache_size=5000), max_samples=4200, n_estimators=10, verbose=0, n_jobs=-1) model.fit(trainX, trainY) prediction = model.predict(testX) prediction = normalizer_Y.inverse_transform(prediction) testY = normalizer_Y.inverse_transform(testY)
X2 = [[float(x) / 10.0, float(x) / 10.0, float(x) / 10.0] for x in range(0, 231)] layers = [] layers.append(Layer("Rectifier", units=100)) layers.append(Layer("Rectifier", units=100)) layers.append(Layer("Rectifier", units=100)) layers.append(Layer("Linear")) model = Regressor(layers=layers, learning_rate=0.001, n_iter=5000, random_state=42) normalizer_X = StandardScaler() trainX = normalizer_X.fit_transform(X) trainX2 = normalizer_X.fit_transform(X2) normalizer_Y = StandardScaler() trainY = normalizer_Y.fit_transform(Y) model.fit(np.array(trainX), np.array(trainY)) Y_pred = model.predict(np.array(trainX2)) Y_pred = normalizer_Y.inverse_transform(Y_pred) Y_pred = [y[0] for y in Y_pred] print(str(Y_pred)) plot2(Y, Y_pred, OUTPUT_PNG_FILE, "Observed pollution concentration levels", "Predicted pollution concentration levels by ANR")
bestPar2 = clf1.best_params_ writeDict(str(bestPar2), "dict2XGB.txt") else: clf1 = XGBClassifier(**bestParamXGB2) clf1.fit(dataTrain, y) delta = gmtime(time() - t0) tstr = strftime('%H:%M:%S', delta) print("Time since beginning:%s" % tstr) # Scale data print("Scaling") scaler = StandardScaler() imputer = Imputer() dataTrain = imputer.fit_transform(dataTrain) dataTrain = scaler.fit_transform(dataTrain) #Fit classifier that needs imputation print("Fitting") if (gridSearchRF): clf2.fit(dataTrain, y) bestPar2 = clf2.best_params_ writeDict(str(bestPar2), "dictRF.txt") else: clf2 = XGBClassifier(**bestParamRF) clf2.fit(dataTrain, y) print("Fit completed") delta = gmtime(time() - t0) tstr = strftime('%H:%M:%S', delta)
plt.ylabel("Amount", size=14) plt.show() ## Plotting the correlation matrix. (Dataset is already PCA'd) sb.heatmap(data=df.corr(), cmap="viridis", annot=False) plt.show() ## There are no categories in the dataset, so no need to do one-hot encoding. ## Splitting the dataset into design matrix X and targets y X = df.loc[:, df.columns != 'Class'].values y = df.loc[:, df.columns == 'Class'].values.ravel() ## Scaling the data (Most for Time and Amount) standard_scaler = StandardScaler() X = standard_scaler.fit_transform(X) ## Randomized undersampling method indices_nonfraud = np.where(y == 0)[0] indices_fraud = np.where(y == 1)[0] np.random.shuffle(indices_nonfraud) indices_nonfraud_under = indices_nonfraud[:num_fraudulent] indices_under = np.concatenate((indices_fraud, indices_nonfraud_under)) np.random.shuffle(indices_under) ## Using indices from undersampling method to create new balanced dataset X_under = X[indices_under] y_under = y[indices_under] ## Looking at the class balance again, now for undersampled data plt.bar([0, 1], [len(indices_nonfraud_under), len(indices_fraud)])
tf.keras.metrics.AUC(name='auc') ]) save_best_callback = tf.keras.callbacks.ModelCheckpoint( './model-{epoch:02d}-{acc:.2f}.hdf5', monitor='acc', verbose=1, save_best_only=True, save_weights_only=False, save_freq=1) logdir = os.path.join('tflogs', datetime.datetime.now().strftime('%Y%m%d-%H%M%S')) tb_train_callback = tf.keras.callbacks.TensorBoard(logdir, histogram_freq=1, profile_batch=0) scaler = StandardScaler() X_train_scaled = scaler.fit_transform(X_train) model.fit( X_train_scaled, y_train, class_weight=class_weight, # batch_size=64, validation_split=0.1, callbacks=[save_best_callback, tb_train_callback], epochs=50) # model = tf.keras.models.load_model('./model-35-0.88.hdf5') X_test_scaled = scaler.transform(X_test) model.evaluate(X_test_scaled, y_test) # print(np.round(model.predict(X_test)))
def main(): args = parse() n_rollout = args.nrollout n_epoch = args.epoch seed = 124 np.random.seed(seed) path = args.filename names = ['target_pos', 'target_speed', 'pos', 'vel', 'effort'] with h5py.File(path, 'r') as f: (target_pos, target_speed, pos, vel, effort) = [[np.array(val) for val in f[name_].values()] for name_ in names] x_target = np.array(target_pos) x_first = np.array([pos_[0] for pos_ in pos]) v_first = np.array([vel_[0] for vel_ in vel]) x_speed = np.array(target_speed).reshape((-1, 1)) aux_output = [np.ones(eff_.shape[0]).reshape((-1, 1)) for eff_ in effort] x = np.concatenate((x_target, x_first, v_first, x_speed), axis=1) def prepare_time_data(data): data_scaler = StandardScaler() data_concat = np.concatenate(data, axis=0) data_scaler.fit(data_concat) new_data = [data_scaler.transform(data_) for data_ in data] return data_scaler, new_data input_scaler = StandardScaler() x = input_scaler.fit_transform(x) effort_scaler, effort = prepare_time_data(effort) pos_scaler, pos = prepare_time_data(pos) vel_scaler, vel = prepare_time_data(vel) torque = pad_sequences(effort, padding='post', value=0., dtype=np.float64) pos = pad_sequences(pos, padding='post', value=0., dtype=np.float64) vel = pad_sequences(vel, padding='post', value=0., dtype=np.float64) aux_output = pad_sequences(aux_output, padding='post', value=0., dtype=np.float64) mask = aux_output[:, :, 0] aux_mask = np.ones(aux_output.shape[:2]) x, x_test, torque, torque_test, pos, pos_test, vel, vel_test, \ aux, aux_test, mask, mask_test, aux_mask, aux_mask_test = \ train_test_split(x, torque, pos, vel, aux_output, mask, aux_mask, test_size=0.3, random_state=seed) kf = KFold(n_splits=3, shuffle=True, random_state=seed) if not os.path.exists('save_model_selection'): os.makedirs('save_model_selection') for (train_index, cv_index), i in zip(kf.split(x), range(kf.n_splits)): widths_gru = [1000] depths_gru = [1] dropout_fractions = [0.5] convolution_layer = [False] l2_weights = [1e-3] names = [ 'gru:{}-{}_conv:{}_dropout:{}_l2:{}/fold:{}'.format( width_, depth_, conv_, drop_, l2_, i) for width_, depth_, conv_, drop_, l2_ in zip( widths_gru, depths_gru, convolution_layer, dropout_fractions, l2_weights) ] save_names = ['save_model_selection/' + name_ for name_ in names] log_names = ['log_model_selection/' + name_ for name_ in names] img_names = ['imgs/' + name_ for name_ in names] this_x, this_torque, this_pos, this_vel, this_aux, this_mask, this_aux_mask = \ [a_[train_index] for a_ in [x, torque, pos, vel, aux, mask, aux_mask]] this_x_cv, this_torque_cv, this_pos_cv, this_vel_cv, this_aux_cv, this_mask_cv, this_aux_mask_cv = \ [a_[cv_index] for a_ in [x, torque, pos, vel, aux, mask, aux_mask]] for width_gru, depth_gru, dropout_fraction, conv, l2_weight, save_name, log_name, img_name in \ zip(widths_gru, depths_gru, dropout_fractions, convolution_layer, l2_weights, save_names, log_names, img_names): div_torque = np.split(this_torque, 7, axis=2) div_torque_cv = np.split(this_torque_cv, 7, axis=2) div_torque_test = np.split(torque_test, 7, axis=2) model = MyModel(train=[this_x, div_torque + [this_aux]], val=[this_x_cv, div_torque_cv + [this_aux_cv]], test=[x_test, div_torque_test + [aux_test]], train_mask=[this_mask] * 7 + [this_aux_mask], val_mask=[this_mask_cv] * 7 + [this_aux_mask_cv], test_mask=[mask_test] * 7 + [aux_mask_test], max_unroll=n_rollout, save_dir=save_name, log_dir=log_name, img_dir=img_name, width_gru=width_gru, depth_gru=depth_gru, width_dense=50, depth_dense=2, torque_scaler=effort_scaler, conv=conv, dropout_fraction=dropout_fraction, l2_weight=l2_weight) if args.train: model.fit(nb_epoch=n_epoch, batch_size=512) elif args.resume: model.resume(nb_epoch=n_epoch, batch_size=512) if args.visualization: model.load() model.save_figs()
def test_scaler_int(): # test that scaler converts integer input to floating # for both sparse and dense matrices rng = np.random.RandomState(42) X = rng.randint(20, size=(4, 5)) X[:, 0] = 0 # first feature is always of zero X_csr = sparse.csr_matrix(X) X_csc = sparse.csc_matrix(X) null_transform = StandardScaler(with_mean=False, with_std=False, copy=True) with warnings.catch_warnings(record=True): X_null = null_transform.fit_transform(X_csr) assert_array_equal(X_null.data, X_csr.data) X_orig = null_transform.inverse_transform(X_null) assert_array_equal(X_orig.data, X_csr.data) with warnings.catch_warnings(record=True): scaler = StandardScaler(with_mean=False).fit(X) X_scaled = scaler.transform(X, copy=True) assert_false(np.any(np.isnan(X_scaled))) with warnings.catch_warnings(record=True): scaler_csr = StandardScaler(with_mean=False).fit(X_csr) X_csr_scaled = scaler_csr.transform(X_csr, copy=True) assert_false(np.any(np.isnan(X_csr_scaled.data))) with warnings.catch_warnings(record=True): scaler_csc = StandardScaler(with_mean=False).fit(X_csc) X_csc_scaled = scaler_csr.transform(X_csc, copy=True) assert_false(np.any(np.isnan(X_csc_scaled.data))) assert_equal(scaler.mean_, scaler_csr.mean_) assert_array_almost_equal(scaler.std_, scaler_csr.std_) assert_equal(scaler.mean_, scaler_csc.mean_) assert_array_almost_equal(scaler.std_, scaler_csc.std_) assert_array_almost_equal(X_scaled.mean(axis=0), [0., 1.109, 1.856, 21., 1.559], 2) assert_array_almost_equal(X_scaled.std(axis=0), [0., 1., 1., 1., 1.]) X_csr_scaled_mean, X_csr_scaled_std = mean_variance_axis0( X_csr_scaled.astype(np.float)) assert_array_almost_equal(X_csr_scaled_mean, X_scaled.mean(axis=0)) assert_array_almost_equal(X_csr_scaled_std, X_scaled.std(axis=0)) # Check that X has not been modified (copy) assert_true(X_scaled is not X) assert_true(X_csr_scaled is not X_csr) X_scaled_back = scaler.inverse_transform(X_scaled) assert_true(X_scaled_back is not X) assert_true(X_scaled_back is not X_scaled) assert_array_almost_equal(X_scaled_back, X) X_csr_scaled_back = scaler_csr.inverse_transform(X_csr_scaled) assert_true(X_csr_scaled_back is not X_csr) assert_true(X_csr_scaled_back is not X_csr_scaled) assert_array_almost_equal(X_csr_scaled_back.toarray(), X) X_csc_scaled_back = scaler_csr.inverse_transform(X_csc_scaled.tocsc()) assert_true(X_csc_scaled_back is not X_csc) assert_true(X_csc_scaled_back is not X_csc_scaled) assert_array_almost_equal(X_csc_scaled_back.toarray(), X)
class SkRanker(Ranker, SkLearner): ''' Basic ranker wrapping scikit-learn functions ''' def train(self, dataset_filename, scale=True, feature_selector=None, feature_selection_params={}, feature_selection_threshold=.25, learning_params={}, optimize=True, optimization_params={}, scorers=['f1_score'], attribute_set=None, class_name=None, metaresults_prefix="./0-", **kwargs): plot_filename = "{}{}".format(metaresults_prefix, "featureselection.pdf") data, labels = dataset_to_instances(dataset_filename, attribute_set, class_name, **kwargs) learner = self.learner #the class must remember the attribute_set and the class_name in order to reproduce the vectors self.attribute_set = attribute_set self.class_name = class_name #scale data to the mean if scale: log.info("Scaling datasets...") log.debug("Data shape before scaling: {}".format(data.shape)) self.scaler = StandardScaler() data = self.scaler.fit_transform(data) log.debug("Data shape after scaling: {}".format(data.shape)) log.debug("Mean: {} , Std: {}".format(self.scaler.mean_, self.scaler.std_)) #avoid any NaNs and Infs that may have occurred due to the scaling data = np.nan_to_num(data) #feature selection if isinstance(feature_selection_params, basestring): feature_selection_params = eval(feature_selection_params) self.featureselector, data, metadata = self.run_feature_selection(data, labels, feature_selector, feature_selection_params, feature_selection_threshold, plot_filename) #initialize learning method and scoring functions and optimize self.learner, self.scorers = self.initialize_learning_method(learner, data, labels, learning_params, optimize, optimization_params, scorers) log.info("Data shape before fitting: {}".format(data.shape)) self.learner.fit(data, labels) self.fit = True return metadata def get_model_description(self): params = {} if self.scaler: params = self.scaler.get_params(deep=True) try: #these are for SVC if self.learner.kernel == "rbf": params["gamma"] = self.learner.gamma params["C"] = self.learner.C for i, n_support in enumerate(self.learner.n_support_): params["n_{}".format(i)] = n_support log.debug(len(self.learner.dual_coef_)) return params elif self.learner.kernel == "linear": coefficients = self.learner.coef_ att_coefficients = {} for attname, coeff in zip(self.attribute_set.get_names_pairwise(), coefficients[0]): att_coefficients[attname] = coeff return att_coefficients except AttributeError: pass try: #adaboost etc params = self.learner.get_params() numeric_params = OrderedDict() for key, value in params.iteritems(): try: value = float(value) except ValueError: continue numeric_params[key] = value return numeric_params except: pass return {} def get_ranked_sentence(self, parallelsentence, critical_attribute="rank_predicted", new_rank_name="rank_hard", del_orig_class_att=False, bidirectional_pairs=False, ties=True, reconstruct='hard'): """ """ if type(self.learner) == str: if self.classifier: self.learner = self.classifier # this is to provide backwards compatibility for old models # whose classes used differeent attribute names try: self.learner._dual_coef_ = self.learner.dual_coef_ self.learner._intercept_ = self.learner.intercept_ except AttributeError: # it's ok if the model doesn't have these variables pass try: # backwards compatibility for old LogisticRegression try_classes = self.learner.classes_ except AttributeError: self.learner.classes_ = [-1, 1] #de-compose multiranked sentence into pairwise comparisons pairwise_parallelsentences = parallelsentence.get_pairwise_parallelsentences(bidirectional_pairs=bidirectional_pairs, class_name=self.class_name, ties=ties) if len(parallelsentence.get_translations()) == 1: log.warning("Parallelsentence has only one target sentence") parallelsentence.tgt[0].add_attribute(new_rank_name, 1) return parallelsentence, {} elif len(parallelsentence.get_translations()) == 0: return parallelsentence, {} #list that will hold the pairwise parallel sentences including the learner's decision classified_pairwise_parallelsentences = [] resultvector = {} for pairwise_parallelsentence in pairwise_parallelsentences: #convert pairwise parallel sentence into an orange instance instance = parallelsentence_to_instance(pairwise_parallelsentence, attribute_set=self.attribute_set) #scale data instance to mean, based on trained scaler if self.scaler: try: instance = np.nan_to_num(instance) instance = self.scaler.transform(instance) except ValueError as e: log.error("Could not transform instance: {}, scikit replied: {}".format(instance, e)) #raise ValueError(e) pass try: if self.featureselector: instance = np.nan_to_num(instance) instance = self.featureselector.transform(instance) except AttributeError: pass log.debug('Instance = {}'.format(instance)) #make sure no NaN or inf appears in the instance instance = np.nan_to_num(instance) #run learner for this instance predicted_value = self.learner.predict(instance) try: distribution = dict(zip(self.learner.classes_, self.learner.predict_proba(instance)[0])) except AttributeError: #if learner does not support per-class probability (e.g. LinearSVC) assign 0.5 distribution = dict([(cl, 0.5) for cl in self.learner.classes_]) log.debug("Distribution: {}".format(distribution)) log.debug("Predicted value: {}".format(predicted_value)) #even if we have a binary learner, it may be that it cannot decide between two classes #for us, this means a tie if not bidirectional_pairs and distribution and len(distribution)==2 and float(distribution[1])==0.5: predicted_value = 0 distribution[predicted_value] = 0.5 log.debug("{}, {}, {}".format(pairwise_parallelsentence.get_system_names(), predicted_value, distribution)) #gather several metadata from the classification, which may be needed resultvector.update({'systems' : pairwise_parallelsentence.get_system_names(), 'value' : predicted_value, 'distribution': distribution, 'confidence': distribution[int(predicted_value)], # 'instance' : instance, }) #add the new predicted ranks as attributes of the new pairwise sentence pairwise_parallelsentence.add_attributes({"rank_predicted":predicted_value, "prob_-1":distribution[-1], "prob_1":distribution[1] }) classified_pairwise_parallelsentences.append(pairwise_parallelsentence) #gather all classified pairwise comparisons of into one parallel sentence again sentenceset = CompactPairwiseParallelSentenceSet(classified_pairwise_parallelsentences) if reconstruct == 'hard': log.debug("Applying hard reconstruction to produce rank {}".format(new_rank_name)) ranked_sentence = sentenceset.get_multiranked_sentence(critical_attribute=critical_attribute, new_rank_name=new_rank_name, del_orig_class_att=del_orig_class_att) else: attribute1 = "prob_-1" attribute2 = "prob_1" log.debug("Applying soft reconstruction to produce rank {}".format(new_rank_name)) try: ranked_sentence = sentenceset.get_multiranked_sentence_with_soft_ranks(attribute1, attribute2, critical_attribute, new_rank_name, normalize_ranking=False) except: raise ValueError("Sentenceset {} from {} caused exception".format(classified_pairwise_parallelsentences, parallelsentence)) return ranked_sentence, resultvector
svecs.append(svec) #END per-student loop svecs = numpy.array(svecs) # gmarks = [] # for sv in svecs: # if sv[0]==-1: # gmarks.append("D") # elif sv[0]==1: # gmarks.append("O") # else: # gmarks.append(".") scaler = StandardScaler() svecs = scaler.fit_transform(svecs) print(svecs) print(m, f, h) print("number of students", len(svecs)) print("gender, avg_atts, avg_hints, avg_succ, avg_diff") kmeans = KMeans(n_clusters=3, n_jobs=-1).fit(svecs) labs = kmeans.labels_ centres = kmeans.cluster_centers_ print(centres) print(kmeans.inertia_) pca = PCA(n_components=2) tvecs = pca.fit_transform(svecs) x, y = zip(*tvecs)
def train_and_test(alpha, predictors, predictor_params, x_filename, y_filename, n_users, percTest, featureset_to_use, diff_weighting, phi, force_balanced_classes, do_scaling, optimise_predictors, report, conf_report=None): # all_X = numpy.loadtxt(x_filename, delimiter=",") all_X = numpy.load(x_filename + ".npy") all_y = numpy.loadtxt(y_filename, delimiter=",") print("loaded X and y files", x_filename, y_filename) if numpy.isnan(all_X.any()): print("nan in", x_filename) exit() if numpy.isnan(all_y.any()): print("nan in", y_filename) exit() #print("selecting balanced subsample") print("t t split") X_train, X_test, y_train, y_test = train_test_split(all_X, all_y, test_size=percTest, random_state=666) # feature extraction # test = SelectKBest(score_func=chi2, k=100) # kb = test.fit(X_train, y_train) # # summarize scores # numpy.set_printoptions(precision=3) # print(kb.scores_) # features = kb.transform(X_train) # mask = kb.get_support() # # summarize selected features # print(features.shape) # X_train = X_train[:,mask] # X_test = X_test[:,mask] scaler = StandardScaler() rdim = FeatureAgglomeration(n_clusters=100) if do_scaling: # input(X_train.shape) X_train = rdim.fit_transform(X_train) X_test = rdim.transform(X_test) X_train = scaler.fit_transform(X_train) X_test = scaler.transform(X_test) with open('../../../isaac_data_files/qutor_scaler.pkl', 'wb') as output: pickle.dump(scaler, output, pickle.HIGHEST_PROTOCOL) with open('../../../isaac_data_files/qutor_rdim.pkl', 'wb') as output: pickle.dump(rdim, output, pickle.HIGHEST_PROTOCOL) # print("feature reduction...") # pc = PCA(n_components=100) # X_train = pc.fit_transform(X_train) # X_test = pc.transform(X_test) classes = numpy.unique(y_train) sample_weights = None if (force_balanced_classes): X_train, y_train = balanced_subsample(X_train, y_train, 1.0) #0.118) print("X_train shape:", X_train.shape) print("X_test shape:", X_test.shape) print("tuning classifier ...") for ix, p in enumerate(predictors): print(type(p)) print(p.get_params().keys()) if optimise_predictors == True and len(predictor_params[ix]) > 1: pbest = run_random_search(p, X_train, y_train, predictor_params[ix]) else: pbest = p.fit(X_train, y_train) predictors[ix] = pbest print("pickling classifier ...") for ix, p in enumerate(predictors): p_name = predictor_params[ix]['name'] with open( '../../../isaac_data_files/p_{}_{}_{}.pkl'.format( p_name, alpha, phi), 'wb') as output: pickle.dump(p, output, pickle.HIGHEST_PROTOCOL) print("done!") # report.write("* ** *** |\| \` | | |) /; `|` / |_| *** ** *\n") # report.write("* ** *** | | /_ |^| |) || | \ | | *** ** *\n") #report.write("RUNS,P,FB,WGT,ALPHA,PHI,SCL,0p,0r,0F,0supp,1p,1r,1F,1supp,avg_p,avg_r,avg_F,#samples\n") for ix, p in enumerate(predictors): report.write(",".join( map(str, (all_X.shape[0], str(p).replace(",", ";").replace( "\n", ""), force_balanced_classes, diff_weighting, alpha, phi, do_scaling)))) y_pred_tr = p.predict(X_train) y_pred = p.predict(X_test) # for x,y,yp in zip(X_train, y_test, y_pred): if conf_report: conf_report.write( str(p).replace(",", ";").replace("\n", "") + "\n") conf_report.write(str(alpha) + "," + str(phi) + "\n") conf_report.write(str(confusion_matrix(y_test, y_pred)) + "\n") conf_report.write("\n") # p = precision_score(y_test, y_pred, average=None, labels=classes) # r = recall_score(y_test, y_pred, average=None, labels=classes) # F = f1_score(y_test, y_pred, average=None, labels=classes) p, r, F, s = precision_recall_fscore_support(y_test, y_pred, labels=classes, average=None, warn_for=('precision', 'recall', 'f-score')) avp, avr, avF, _ = precision_recall_fscore_support( y_test, y_pred, labels=classes, average='weighted', warn_for=('precision', 'recall', 'f-score')) for ix, c in enumerate(classes): report.write(",{},{},{},{},{},".format(c, p[ix], r[ix], F[ix], s[ix])) report.write("{},{},{},{}\n".format(avp, avr, avF, numpy.sum(s))) # report.write(classification_report(y_test, y_pred)+"\n") # report.write("------END OF CLASSIFIER------\n") report.flush() return X_train, X_test, y_pred_tr, y_pred, y_test, scaler
def split_train_validation_test(multi_time_series_df, valid_start_time, test_start_time, features, time_step_lag=1, horizon=1, target='target', time_format='%Y-%m-%d %H:%M:%S', freq='H'): if not isinstance(features, list) or len(features) < 1: raise Exception( "Bad input for features. It must be an array of dataframe colummns used" ) train = multi_time_series_df.copy()[ multi_time_series_df.index < valid_start_time] train_features = train[features] train_targets = train[target] # X_scaler = MinMaxScaler() # target_scaler = MinMaxScaler() # y_scaler = MinMaxScaler() X_scaler = StandardScaler() target_scaler = StandardScaler() y_scaler = StandardScaler() # 'load' is our key target. If it is in features, then we scale it. # if it not 'load', then we scale the first column if 'load' in features: tg = train[['load']] y_scaler.fit(tg) else: tg = train[target] ## scale the first column y_scaler.fit(tg.values.reshape(-1, 1)) train[target] = target_scaler.fit_transform(train_targets) X_scaler.fit(train_features) train[features] = X_scaler.transform(train_features) tensor_structure = {'X': (range(-time_step_lag + 1, 1), features)} train_inputs = TimeSeriesTensor(train, target=target, H=horizon, freq=freq, tensor_structure=tensor_structure) print(train_inputs.dataframe.head()) look_back_dt = dt.datetime.strptime( valid_start_time, time_format) - dt.timedelta(hours=time_step_lag - 1) valid = multi_time_series_df.copy()[ (multi_time_series_df.index >= look_back_dt) & (multi_time_series_df.index < test_start_time)] valid_features = valid[features] valid[features] = X_scaler.transform(valid_features) tensor_structure = {'X': (range(-time_step_lag + 1, 1), features)} valid_inputs = TimeSeriesTensor(valid, target=target, H=horizon, freq=freq, tensor_structure=tensor_structure) print(valid_inputs.dataframe.head()) # test set # look_back_dt = dt.datetime.strptime(test_start_time, '%Y-%m-%d %H:%M:%S') - dt.timedelta(hours=time_step_lag - 1) test = multi_time_series_df.copy()[test_start_time:] test_features = test[features] test[features] = X_scaler.transform(test_features) test_inputs = TimeSeriesTensor(test, target=target, H=horizon, freq=freq, tensor_structure=tensor_structure) print("time lag:", time_step_lag, "original_feature:", len(features)) return train_inputs, valid_inputs, test_inputs, y_scaler