HI Everyone...

I am working on this code and I keep getting this error .
please help.
Thanks

[code]

im = imread('S.jpeg');
im = rgb2gray(im);
im = im2double(im);
 g = im;
 im = imnoise(im,'speckle' , 0.6);
 im1 = ones(size(im));
 [m,n] = size(im);
 tic
 for i = 1:16:m-15
     for j = 1:16:n-15
         subim = im(i:i+15,j:j+15);
         [Energy wt sptx spty eptx epty]=extbeamlets(im)
         [selected xp0 yp0 xp1 yp1] = threshold(Energy sptx spty eptx
epty);
         result = drawbmlets(selected,xp0,yp0,xp1,yp1,subim);
         im1(i:i+15,j:j+15) = result;
     end
 end
 toc
 figure, imshow(im1);
 ################################################################
(selected xp0 yp0 xp1 yp1) = threshold(Energy sptx spty eptx epty);
                       |
Error: Missing MATLAB operator.

Please tell me why I get missing MATLAB Operator.. is it becausse I
have to write a sub code for threshold? Please help....