Error : Incomplete or misformed expression or statement.

Error : Incomplete or misformed expression or statement. Line: 4 Column: 6

CODE : A function that creates overlapping blocks of same size from an image

function [blocks,val1,val2]=frame2OverlappingBlocks(I,blockSize,shift)

   if blockSize(1)>=shift
   [n_row,n_col] = size(I);

   %check the dimension consistency
   [~,pos1,val1]=find((((1:shift:n_row) + blockSize(1)-1)>=n_row).*((1:shift:n_row) + blockSize(1)-1),1);
   [~,pos2,val2]=find((((1:shift:n_col) + blockSize(2)-1)>=n_col).*((1:shift:n_col) + blockSize(2)-1),1);

   I = imresize(I,[val1 val2]);

   %[n_row_new,n_col_new] = size(I);
   blocksPerRow = pos2;
   howManyRows = pos1;

   blocks = cell(howManyRows,blocksPerRow);

   for i=1:howManyRows
       for j=1:blocksPerRow
           topLeftPel = [shift*i-(shift-1) shift*j-(shift-1)];
           blocks{i,j}.intensity = I(topLeftPel(1):topLeftPel(1)+blockSize(1)-1,topLeftPel(2):topLeftPel(2)+blockSize(2)-1); 
           blocks{i,j}.topLeftPixel = topLeftPel;
       end
   end
   else
       display('Amount of shift is greater than the Block size!!');
   end
end

[Walter Roberson]

Which MATLAB version are you using? If you are using R2008b or earlier, try replacing the ~ with the name of an otherwise unused variable.

[Gaurav]

Using MATLAB 7

Answer 1

[Walter Roberson]

Change

   [~,pos1,val1]=find((((1:shift:n_row) + blockSize(1)-1)>=n_row).*((1:shift:n_row) + blockSize(1)-1),1);
   [~,pos2,val2]=find((((1:shift:n_col) + blockSize(2)-1)>=n_col).*((1:shift:n_col) + blockSize(2)-1),1);

to

   [UnusedVariable1,pos1,val1]=find((((1:shift:n_row) + blockSize(1)-1)>=n_row).*((1:shift:n_row) + blockSize(1)-1),1);
   clear UnusedVariable1
   [UnusedVariable2,pos2,val2]=find((((1:shift:n_col) + blockSize(2)-1)>=n_col).*((1:shift:n_col) + blockSize(2)-1),1);
   clear UnusedVariable2

[Gaurav]

Thanks a lot Sir