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低维转高维
使用reshape函数,执行如下操作:
- %% 维度转换
- A=1:12;
- % 一维转二维
- B2=reshape(A,[6,2])
- >>B2 =
- 1 7
- 2 8
- 3 9
- 4 10
- 5 11
- 6 12
- % 一维转三维
- B3=reshape(A,[2,2,3])
- >>B3(:,:,1) =
- 1 3
- 2 4
- B3(:,:,2) =
- 5 7
- 6 8
- B3(:,:,3) =
- 9 11
- 10 12
- % 二维转三维
- C3=reshape(B2,[2,2,3])
- >>C3(:,:,1) =
- 1 3
- 2 4
- C3(:,:,2) =
- 5 7
- 6 8
- C3(:,:,3) =
- 9 11
- 10 12
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高维转低维
- % 三维转二维
- A=rand(3,3,3);
- A1 = A(:,:,2); % 3*3 二维
- A2 = A(:,2,:); % 3*1*3 三维
- A3 = A(2,:,:); % 1*3*3 三维
- % 将三维转为 81*81 二维
- A22 = reshape(A2,3,3);
- A32 = reshape(A3,3,3);
- % 三维转一维
- B1=reshape(A,1,[]);
- % 二维转一维
- C1=reshape(A22,1,[]);
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