When plotting ROC curve; test_label​s=double(n​ominal(imd​sTest.Labe​ls)); I am getting an error as " Unrecognized function or variable 'nominal' .

When plotting ROC curve;

test_labels=double(nominal(imdsTest.Labels));

I am getting an error as

" Unrecognized function or variable 'nominal' .

I am just wondering what I am missing here. Appriciate any help.

Answer 1

[VBBV]

test_labels = nominal(imdsTest.Labels);
double(test_labels)  % try this 

If you have defined function named nominal in your program which returns double values its best to avoid using on function names and apply on return values, as above

[Madhusudhan Rao]

Thanks for your reply. Still getting same error.

I haven't used the function 'nominal' in this Transfer Learning program. I used ResNet50 as a pretrained CNN. Should I import and install any module that may contain this function ?

% Confusion Matrix

figure;

plotconfusion(actual_labels,predicted_labels)

title('Confusion Matrix: ResNet50');

accuracy

%ROC Curve

test_labels = nominal(imds_Test.Labels );

double(test_labels)

[fp_rate,tp_rate,T,AUC]=perfcurve(test_labels,posterior(:,1),1);

figure; ....

[VBBV]

Yes. This appears to be a standard built-in function from another module.