Cant seem understand the error in code

%%convolution
for i=1:size(I,1)-M  %This line of code gives error as "At least one END is missing. The statement beginning here does not have a matching end."
    for j=1:size(I,2)-N
        Temp=I(i:i+M,j:j+M).*Kernel;% Multiply kernel with original image
        Output(i,j)=sum(Temp(:));
    end
    Output=uint8(Output);
    figure, imshow(Output);

Pl help

Answer 1

[Walter Roberson]

You have an end statement corresponding to for j but you do not have an end statement corresponding to for i

I suspect you want

%%convolution
for i=1:size(I,1)-M 
    for j=1:size(I,2)-N
        Temp=I(i:i+M,j:j+M).*Kernel;% Multiply kernel with original image
        Output(i,j)=sum(Temp(:));
    end
end
Output=uint8(Output);
figure, imshow(Output);

Answer 2

[Dyuman Joshi]

for loops need to be completed with "end". You initiated 2 for loops, but you only closed one.

for i=1:size(I,1)-M
    for j=1:size(I,2)-N
        %                v 
        Temp=I(i:i+M,j:j+M).*Kernel;% Multiply kernel with original image
        Output(i,j)=sum(Temp,'all');
    end
%Missing end
end

There might be a typo in the index, as I have highlighted above, you might want to use -

j:j+N