How to find the percentage accuracy of LDA classifier?

Question

Zuha Yousuf 2020-3-30

回答： Bhargavi Maganuru 2020-4-2

Hi, I'm looking for any code or function that will help me calculate the percentage accuracy of my LDA classifier. Thanks!

Mohammad Sami 2020-3-30

How did you train your classifier.

The following functions will help you. check documentations for more details

confusionchart Create confusion matrix chart for classification problem

confusionmat Compute confusion matrix for classification problem

perfcurve Receiver operating characteristic (ROC) curve or other performance curve for classifier output

Answer 1

Bhargavi Maganuru 2020-4-2

If you have true classes and predicted classes, you can create confusion matrix from it

c = confusionmat(true,predicted);

and find the accuracy using

accuracy = sum(diag(c))/sum(c);