Help with adding a column with numbers that are repeated to a matrix

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Samy Ben Thabet
Samy Ben Thabet 2018-11-29
回答： Adam Danz 2018-11-29
Hi,
I have a 2170x1 matrix I need to create a new 2170x2 matric where I add numbers going from 1 to 12 in the second column all the way to row 2170. The thing is that when 12 is reached I need it to start at 1 again and so on until the end of my matrix is reached but I can't figure out how to do that.

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Adam Danz
Adam Danz 2018-11-29
If 'm' is your 2170x1 matrix,
pattern = [1:12]';
patternRep = repmat(pattern, ceil(size(m,1) / length(pattern)), 1);
m(:,2) = patternRep(1:size(m,1));

更多回答（1 个）

Matt J
Matt J 2018-11-29
编辑：Matt J 2018-11-29
Let's say your matrix is A,
A(:,2)=mod(0:2169,12)+1;

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