How to do the following in a simpler and smarter way?

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Stamatis Samaras
Stamatis Samaras 2013-11-3
评论： Stamatis Samaras 2013-11-3
The following code prepares the labels for some classes. We have standard 12 elements of 1,2,3,...,21 one after another. Now is there any other way to get this array than putting them one by one by hand.
c=[1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,...
4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,...
7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,...
10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,11,11,...
12,12,12,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,13,13,13,13,...
14,14,14,14,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,15,15,15,15,...
16,16,16,16,16,16,16,16,16,16,16,16,17,17,17,17,17,17,17,17,17,17,17,17,...
18,18,18,18,18,18,18,18,18,18,18,18,19,19,19,19,19,19,19,19,19,19,19,19,...
20,20,20,20,20,20,20,20,20,20,20,20,21,21,21,21,21,21,21,21,21,21,21,21];

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-11-3
编辑：Azzi Abdelmalek 2013-11-3
C=repmat(1:21,12,1)
C=C(:)'
%or
C=1:21;
C=reshape(C(ones(12,1),:),1,[])

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2013-11-3
kron(1:21,ones(1,12))

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