Sklearn plot confusion matrix

Import sklearn.metrics from plot_confusion_matrix

from sklearn.metrics import plot_confusion_matrix

Sklearn plot confusion matrix

import matplotlib.pyplot as plt
from sklearn.metrics import confusion_matrix, plot_confusion_matrix

clf = # define your classifier (Decision Tree, Random Forest etc.)
clf.fit(X, y) # fit your classifier

# make predictions with your classifier
y_pred = clf.predict(X)         
# optional: get true negative (tn), false positive (fp)
# false negative (fn) and true positive (tp) from confusion matrix
M = confusion_matrix(y, y_pred)
tn, fp, fn, tp = M.ravel() 
# plotting the confusion matrix
plot_confusion_matrix(clf, X, y)
plt.show()

Plotting confusion matrix

from sklearn.metrics import confusion_matrix
matrix_confusion = confusion_matrix(y_test, y_pred)
sns.heatmap(matrix_confusion, square=True, annot=True, cmap='Blues', fmt='d', cbar=False

Confusion matrix with labels sklearn

import pandas as pd
y_true = pd.Series([2, 0, 2, 2, 0, 1, 1, 2, 2, 0, 1, 2])
y_pred = pd.Series([0, 0, 2, 1, 0, 2, 1, 0, 2, 0, 2, 2])

pd.crosstab(y_true, y_pred, rownames=['True'], colnames=['Predicted'], margins=True)

Source: stats.stackexchange.com

Similar codes

1 vote161 views1 answer
Py file open with
Python
0 vote137 views1 answer
String with comma to int python
Python
0 vote234 views1 answer
How to check local endianness with Python ?
Python
0 vote149 views1 answer
Python requests ignore cert
Python
2 votes148 views1 answer
Swapcase
Python
4 votes138 views1 answer
Download python 2.7 for windows 10
Python
19 votes177 views1 answer
Python ignore runtimewarning
Python
0 vote178 views1 answer
Python open all files of type csv
Python
0 vote104 views1 answer
Goto statement in python geeksforgeeks
Python
31 votes157 views6 answers
Count list python
Python