Where to make change in my program to get output like figure 2

I have calculated the Euclidean distance of matrix but am not getting correct ROC-like in fig 2. I have attached my program files herewith, firstly run PCA_ORL_11.m

[Walter Roberson]

Your ROC calculation is not obvious: why should the false rate be calculated like that??

The code also involves a series of "magic numbers" that are meaningless to outside observers like us.

[Balaji M. Sontakke]

how to calculate false rate and how to show its curve.

I am attaching my database herewith.