简洁的想法

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Matlab & Magic

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这次不想说magic(3), 

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magic(3)
ans =
     8     1     6
     3     5     7
     4     9     2

外国佬是玩倒立, 还是中国的九宫决看着舒服:
二四为肩,六八为足,左三右七,戴九履一,五居中央.

我想说的是Matlab的Matrix就像Magic:

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>> a = [1:3]'
a =
     1
     2
     3
>> b = a(:,ones(1,4),ones(1,1,5))
b(:,:,1) =
     1     1     1     1
     2     2     2     2
     3     3     3     3
b(:,:,2) =
     1     1     1     1
     2     2     2     2
     3     3     3     3
b(:,:,3) =
     1     1     1     1
     2     2     2     2
     3     3     3     3
b(:,:,4) =
     1     1     1     1
     2     2     2     2
     3     3     3     3
b(:,:,5) =
     1     1     1     1
     2     2     2     2
     3     3     3     3
>> c = permute(b, [2,3,1])
c(:,:,1) =
     1     1     1     1     1
     1     1     1     1     1
     1     1     1     1     1
     1     1     1     1     1
c(:,:,2) =
     2     2     2     2     2
     2     2     2     2     2
     2     2     2     2     2
     2     2     2     2     2
c(:,:,3) =
     3     3     3     3     3
     3     3     3     3     3
     3     3     3     3     3
     3     3     3     3     3

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