sensitivity,specificity calculation

How to calculate sensitivity specificity from learner app via roc curve and confusion matrix.please tell me how to read it and how to do calculation for these parameter?

Answer 1

[Image Analyst]

The confusion matrix tells you what class your observation got assigned versus what its true classification was. A good classification scheme would have high values along the diagonal and zeros or low values off the diagonal, meaning that most things got properly identified and few things got incorrectly identified.

[Ganashree T S]

i am getting charchter error for sensitivity and specitivity..how can u help me