how to plot ROC curve ,given False positive rate and true positive rate

TPR=[0.245 0.355 0.678 0.99 1]
FPR=[0.444 0.678 0.789 0.88 1]
plotroc(TPR,FPR)

when i use use plotroc,the graph displayed is in straight line manner. How to get a graph in a curved manner

Answer 1

[Steven Van Vaerenbergh]

The first and second argument for plotroc are the targets and outputs which you used to calculate FPR and TPR.

You can plot the ROC by using plot:

plot(TPR,FPR);

or by using plotroc on the original targets and outputs:

plotroc(targets,outputs);