% The multiplicative constants for the 13 point FFT

I = sqrt(-1);
u = [
       -1.083333333333333
       -0.300462606288666
       -0.749279330626139*I
        0.401002128321867*I
        0.174138601152136*I
        1.007074065727533
        0.731245990975348
       -0.579440018900960
        0.531932498429674
       -0.508814921720398
       -0.007705858903092
       -2.511393318389568*I
       -1.823546408682421*I
        1.444979909023996*I
       -1.344056915177370*I
       -0.975932420775946*I
        0.773329778651105*I
        1.927725116783469*I
        1.399739414729183*I
       -1.109154843837551*I
];


% The input permutation for the 13 point FFT

ip = [
   1
   2
   4
   10
   6
   3
   7
   13
   11
   5
   9
   12
   8
];


% The output permutation for the 13 point FFT

op = [
   1
   13
   2
   11
   6
   4
   3
   9
   10
   12
   5
   8
   7
];