How to plot a confusion matrix

Question

I am trying to evaluate my renet50 model with a confusion matrix, but the confusion matrix looks like this:

matrix = confusion_matrix(y_test, y_pred, normalize="pred")
print(matrix)
    
# output
array([[1, 0],
      [1, 2]], dtype=int64)

I am using scikit-learn for generating the confusion matrix and tf keras for making the model

but is there any way I can plot/visualize the confusion matrix?

i already try using sklearn.metrics.plot_confusion_matrix(matrix)

and this: How to plot Confusion Matrix
but I got this:

Asked By: maygon

||

Source

Answer 1

Include the following imports:

from sklearn.metrics import ConfusionMatrixDisplay 
from matplotlib import pyplot as plt

Now, call the ConfusionMatrixDisplay function and pass your matrix as an argument, like this:

disp = ConfusionMatrixDisplay(confusion_matrix=matrix) 
# Then just plot it: 
disp.plot() 
# And show it: 
plt.show()

Additionally, you can set the normalize parameter to True in the ConfusionMatrixDisplay function to display the normalized counts in the plot. Check out the docs for further reference and additional accepted parameters.

Answered By: stateMachine

Answer 2

use

disp = ConfusionMatrixDisplay(confusion_matrix=matrix)  
disp.plot()    
plt.show()

Answered By: maygon4000

How to plot a confusion matrix

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