X has 50 features per sample; expecting 185 in python

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-88-230199fd3a97> in <module>
      4 X1, X2 = np.meshgrid(np.arange(start = X_set[:, 0].min() - 1, stop = X_set[:, 0].max() + 1, step = 0.01),
      5                      np.arange(start = X_set[:, 1].min() - 1, stop = X_set[:, 1].max() + 1, step = 0.01))
----> 6 plt.contourf(X1, X2, classifier.predict(np.array([X1.ravel(), X2.ravel()]).T).reshape(X1.shape),
      7              alpha = 0.75, cmap = ListedColormap(('red', 'green')))
      8 plt.xlim(X1.min(), X1.max())

/usr/local/lib/python3.6/dist-packages/sklearn/linear_model/base.py in predict(self, X)
    287             Predicted class label per sample.
    288         """
--> 289         scores = self.decision_function(X)
    290         if len(scores.shape) == 1:
    291             indices = (scores > 0).astype(np.int)

/usr/local/lib/python3.6/dist-packages/sklearn/linear_model/base.py in decision_function(self, X)
    268         if X.shape[1] != n_features:
    269             raise ValueError("X has %d features per sample; expecting %d"
--> 270                              % (X.shape[1], n_features))
    271 
    272         scores = safe_sparse_dot(X, self.coef_.T,

ValueError: X has 2 features per sample; expecting 11

Posted by: Guest on April-04-2021

Source

#Split the variables X = dataset.iloc[:, :11].values y = dataset.iloc[:, -1].values # Splitting the dataset into the Training set and Test set from sklearn.model_selection import train_test_split X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = 0.2, random_state = 0) # Feature Scaling from sklearn.preprocessing import StandardScaler sc = StandardScaler() X_train = sc.fit_transform(X_train) X_test = sc.transform(X_test) # Fitting Logistic Regression to the Training set from sklearn.linear_model import LogisticRegression classifier = LogisticRegression(random_state = 0) classifier.fit(X_train, y_train) # Predicting the Test set results y_pred = classifier.predict(X_test) # Making the Confusion Matrix from sklearn.metrics import confusion_matrix, accuracy_score cm = confusion_matrix(y_test, y_pred) acc_score = accuracy_score(y_test, y_pred) print(acc_score*100)

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