how to crop image in matlab using only for loop? [duplicate] - matlab

This question already has an answer here:
Zoom and Crop Image (Matrix)
(1 answer)
Closed 7 years ago.
i made it with Matrix.how can i make it with for loop
crop.m
function s=crop(f,m,n,x,y)
s=f(x:x+m,y:y+n);


this is code
crop1.m
function s=crop1(f,m,n,x,y)
for i=x:1:x+m
for j=y:1:y+n
s(i-x+1,j-y+1,:)=f(i,j,:);
end
end

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How to make MATLAB start the xtick from the very beginning? [duplicate]

This question already has answers here:
limit the axes for plotting in Matlab [duplicate]
(2 answers)
Closed 3 years ago.
I am plotting with MATLAB and make MATLAB to put 15 xticks on the x-label. The first xtick doesn't start from the very beginning, though.
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Closed 6 years ago.
I want to know how to comment a block in MATLAB. I know that in the C language I use / *; But I could not find out about MATLAB.

You can comment out MATLAB blocks with
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Outside comment

imwrite matlab "You may not have write permission." [duplicate]

This question already has an answer here:
I am encountering an error while using imwrite
(1 answer)
Closed 7 years ago.
I have this with imwrite in matlab it says: "You may not have write permission." I tried to change the format of the image but It doesn't work.

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How to vectorize a loop in matlab [duplicate]

This question already has answers here:
Structure initialization with repmat
(2 answers)
Closed 9 years ago.
I want to use a function repmat to write this code:
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for i=1:10
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end
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You can use deal:
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PS: It is best not to use i and j as variables in Matlab.