For loop difference between two point in a vector

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Ornella Fanais
Ornella Fanais 2018-5-21
评论： Ornella Fanais 2018-5-21
Hi everyone! I have a problem, I have to do a difference between two point: I have this vector for example M=[1;2;4;6;7;8] and my for loop should be able to construct this vector [2-1;4-2;6-4;7-6;8-7]. I'm using this script, but It's worng
for i=M(0):length(M)-1
inc=M((i)+1)-M(i);
end
I'm hoping you can help me. Thanks!!!! :)

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KSSV
KSSV 2018-5-21
编辑：KSSV 2018-5-21
iwant = diff(M)
If you are adamant about loop:
M = [1;2;4;6;7;8] ;
N1 = [2-1;4-2;6-4;7-6;8-7] ;
N = zeros(length(M)-1,1) ;
for i = 1:length(M)-1
N(i) = M(i+1)-M(i) ;
end
  2 个评论
Jan
Jan 2018-5-21
编辑：Jan 2018-5-21
+1. Perfect. The efficient diff is mentioned and the problem of the loop is explained.
Another solution:
N = M(2:end) - M(1:end-1)

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