MATLAB在统计学和机器学习工具包中提供了两种画误差矩阵（Confusion matrix）的函数。

figure;
plotconfusion(YValidation,YPred)

figure;
cm = confusionchart(YValidation,YPred)
cm.Title = 'Confusion Matrix for Validation Data';
cm.RowSummary = 'row-normalized';
cm.ColumnSummary = 'column-normalized';