Find out seperate results from Confusionmat

I have the below code and answers

[C,order] = confusionmat(exPostDS.Passed_1,predDS.PredRating)

C =

     638    62
     151   149

order = 

      '1'
      '2'

I would like to know if I can get to know what the values 62 and 151 hold in terms of separate rows. All values are clients which I would like to know at least the ClientID.

Is it possible to be done?

Answer 1

[Tom Lane]

If I run this code:

load fisheriris
x = meas;
y = species;
yhat = classify(x,x,y);
[cm,order] = confusionmat(y,yhat);

the confusion matrix cm indicates a count of 2 in the [2,3] entry. Here's how I can locate those two rows:

find(strcmp(y,order{2}) & strcmp(yhat,order{3}))

Here my variables y and yhat are cell arrays of strings. You may have to adjust this if your inputs to confusionmat are different data types.

[Gledson Melotti]

How do I calculate the sensitivity and specificity with the confusionmat command? What is the position of TP, FP, FN, TN in the confusion matrix provided by matlab? I use "confusionmat".