I am stuck in my code? Help me figure out where am i wrong??

I am doing project in brain tumor segmentation. I stuck in feature extraction step which i done by using 1D wavelet decomposition...

i attached my file! Moreover it showing the following error: ??? Subscripted assignment dimension mismatch.

Error in ==> swtfeat2 at 61 feat(1:winsize,i) = detrend(curwin);

Error in ==> SkullStripping at 127 [e v sd en] = swtfeat2(ff,256,32,32);

i called the function using the command [e v sd en] = swtfeat2(ff,256,32,32);

pls help me where am i wrong!! But one thing i noticed! when i convert the final image to vector (1x(256*256)) I am getting output!!But when i use the image as (256x256) am getting this error! Please help me!!