Hello, I'm in need of some assistance with this error:
ValueError: Expected to receive a 2D array, but instead got a 1D array:
array=[0. 0. 0. ... 0. 0. 1.].
To resolve this, you can reshape your data by using either array.reshape(-1, 1) if it's a single feature or array.reshape(1, -1) if it's a single sample.
The relevant code is as follows:
train, test = train_test_split(dataset_ordenado, test_size = 0.30, random_state = 20201122)
Objetivo_train=train['results']
Objetivo_test=test['results']
Indep_train=train.drop(['results'],axis=1)
Indep_test=test.drop(['results'],axis=1)
TS = TimeSeriesSplit(n_splits = 5)
dt = DecisionTreeClassifier()
grid = {'max_depth': [5,7,9,11,15], 'min_samples_leaf': [5,7,9,11,13],'criterion': ['gini', 'entropy']}
gs = GridSearchCV(dt, param_grid=grid, cv=TS)
gs.fit(Objetivo_train, Indep_train)