advanced code snippet search

We Recommend

Beginning XML Beginning XML
The perfect resource for beginning XML programmers, this guidebook shows you what XML is, how to use it, and what technologies surround it. The authors build on the strengths of previous editions while covering the latest changes in the XML landscape such as XQuery, RSS and Atom, and Ajax.

Posted By

benjamin on 10/29/09


Tagged

matlab area the curve numerical under auc computing receiver operating characteristics roc


Versions (?)


true positive rate and false positive rate for receiver operating characteristics (ROC) and area under the curve

Published in: MatLab 

URL: http://www.myoutsourcedbrain.com/2008/11/receiver-operating-characteristic-roc.html

i assume you have T,Y element of {-1,1}, see also my AUC function.

Embed | Plain TextExpand 
  1. function [TP,FP]=getfptp(T,Y)
  2.     Y(Y>=0)=1;Y(Y<0)=-1;  % target class (positive) is 1
  3.     TP=sum( ( (Y==1) + (T==1) )==2 );
  4.     FN=sum( ( (Y==-1) + (T==1) )==2 );
  5.     FP=sum( ( (Y==1) + (T==-1) )==2 );
  6.     TN=sum( ( (Y==-1) + (T==-1) )==2 );
  7.     TP=TP/(TP+FN);
  8.     FP=FP/(FP+TN);
  9. end

Report this snippet 

You need to login to post a comment.