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内容简介作者简介 - 科学与工程计算系

内容简介作者简介 - 科学与工程计算系

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epmat(ones(2,3),[1,1,3])<br />

ans(:,:,1) =<br />

1 1 1<br />

1 1 1<br />

ans(:,:,2) =<br />

1 1 1<br />

1 1 1<br />

ans(:,:,3) =<br />

1 1 1<br />

1 1 1<br />

(3)<br />

reshape(1:12,2,2,3)<br />

ans(:,:,1) =<br />

1 3<br />

2 4<br />

ans(:,:,2) =<br />

5 7<br />

6 8<br />

ans(:,:,3) =<br />

9 11<br />

10 12<br />

2.11.2 高维数组的标识<br />

【例 2.11.2-1】维数、大小和长度<br />

clear;A=reshape(1:24,2,3,4);<br />

dim_A=ndims(A)<br />

size_A=size(A)<br />

L_A=length(A)<br />

dim_A =<br />

3<br />

size_A =<br />

2 3 4<br />

L_A =<br />

4<br />

2.11.3 高维数组构作和操作函数汇总<br />

【例 2.11.3-1】数组元素对称交换指令 flipdim 的使用示例。<br />

A=reshape(1:18,2,3,3)<br />

A(:,:,1) =<br />

1 3 5<br />

2 4 6<br />

A(:,:,2) =<br />

7 9 11<br />

8 10 12<br />

A(:,:,3) =<br />

13 15 17<br />

14 16 18<br />

flipdim(A,1)<br />

ans(:,:,1) =<br />

2 4 6<br />

1 3 5<br />

ans(:,:,2) =<br />

8 10 12<br />

7 9 11<br />

13

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