How to calculate ROC values using classperf?

Is it possible to get the ROC curve from the results of

classperf(response, validationPredictions);

Answer 1

[Arjun]

Hi @Asim Shahzad,

I see that you want to get "ROC" values using "classperf" function of MATLAB.

While checking out properties associated with object returned by "classperf" function there was no property which can be directly associated with finding "ROC" values. You can checkout the documentation of "classperf" function and properties associated with the object returned by it in the following links respectively:

• https://www.mathworks.com/help/releases/R2021a/bioinfo/ref/classperf.html
• https://www.mathworks.com/help/releases/R2021a/bioinfo/ref/biolearning.classperformance-properties.html

However you can use "perfcurve" function of MATLAB to obtain the "ROC" values. Kindly refer to the documentation of "perfcurve" function and one MATLAB Answer's resource attached below to get a better understanding of the usage of the function.

• https://www.mathworks.com/help/releases/R2021a/stats/perfcurve.html
• https://www.mathworks.com/matlabcentral/answers/443799-roc-curve-for-multiclass-classifier

I hope this will help!