MATLAB: What is wrong in this code

image segmentationMATLAB

function [jaccard_Idx,jaccardDist]=jacarrd_coefficient(imgorig,imgseg)
{
    %check for logical image
if ~islogical(imgorig)
    error('Image must be logical');
end
    if ~islogical(imgseg)
            error('Image must be logical');
    end
        %find the intersection of both the  image
        inter_image=img_orig & img_seg;
        %find the union of both the image
        union_image=img_orig./img_seg;
        jaccard_Idx=sum(inter_image(:))./sum(union_image(:));
        jaccardDist=1-jaccard_Idx;
    }
getting following error
??? Error: File: jacarrd_coefficient.m Line: 4 Column: 1 Illegal use of reserved keyword "if".

Best Answer

You're not using the proper Matlab syntax for defining function, i.e. you don't need curly braces to define function. Just remove them and it should be fine.
function [jaccard_Idx,jaccardDist]=jacarrd_coefficient(imgorig,imgseg)
      %check for logical image
  if ~islogical(imgorig)
      error('Image must be logical');
  end
      if ~islogical(imgseg)
              error('Image must be logical');
      end
          %find the intersection of both the  image
          inter_image=img_orig & img_seg;
          %find the union of both the image
          union_image=img_orig./img_seg;
          jaccard_Idx=sum(inter_image(:))./sum(union_image(:));
          jaccardDist=1-jaccard_Idx;
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