How to plot confusion matrix?
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Hello, i want to plot a confusion matrix, but i don't know witch are the true labels target and witch are predicted labels outputs.
plotconfusion(targets,outputs) plots a confusion matrix for the true labels targets and predicted labels outputs. Specify the labels as categorical vectors, or in one-of-N (one-hot) form.
Please help.
回答（1 个）
Purvaja
2025-2-17
According to your question, you want to know which variables would be the right arguments for “plotconfusion” function.
As mentioned in documentation:
“plotconfusion(targets,outputs) plots a confusion matrix for the true labels targets and predicted labels outputs.”
After observing your workspace variables, I have observed that you have “YTest” and “YPred” variables, which would signify “targets” and “outputs” arguments for “plotconfusion” function.
So you can implement your function as follows:
plotconfusion(YTest, YPred);
For more clarification, the following documentation links would be helpful:
You can also try “confusionmat” function :
You can try this command in your MATLAB command window for specific release documentation:
web(fullfile(docroot, 'images/ref/plotconfusion.html'))
For examples enter following command in your command window:
openExample('nnet/PlotConfusionMatrixUsingCategoricalLabelsExample')
Hope this helps you!
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2018-10-6
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