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Subtract rows in matrix using loop

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David du Preez
David du Preez 2017-5-11
评论： David du Preez 2017-5-11
Hi, I have a 11 x 3541 matrix. For each column I want subtract; row1 from row1 then,row1 from row 2 then, row2 from row 3 and so on. I have tried using a loop but it doesn't work.
for i= 0:12
mono_am = UVI_all_am(1+i,:) - UVI_all_am(i+1-i,:);
end

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Stephen23
Stephen23 2017-5-11
编辑：Stephen23 2017-5-11
Use diff:
diff(UVI_all_am,1,1)
And stick a row of zeros along the top if you really need row1 - row1.

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