get a diagonal line in matrix
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Hi, please help me get a diagonal line in matlab. Example, I have a matrix: a = [1 2 3; 4 5 6; 7 8 9] I want to get vector b =[3 5 7] which is a diagonal line of matrix a. This is my code but it doesn't work
a=[1 2 3; 4 5 6; 7 8 9];
b = zeros(1,3);
for i=1:3
for i=1:3
b = a(i,j);
end
end
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Jan
am 21 Aug. 2017
Bearbeitet: Jan
am 21 Aug. 2017
Or:
a = [1 2 3; 4 5 6; 7 8 9];
s = size(a);
index = (numel(a) - s(1) + 1):(1 - s(1)):s(2);
b = a(index)
[EDITED, works with non square matrices now]
3 Kommentare
Jan
am 22 Aug. 2017
If you really want a loop:
b = zeros(1,3);
for i = 1:3
b(i) = a(i, 4 - i);
end
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