How to make a 4-D Matrix from 1-D Array?

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ANANTA BIJOY BHADRA
回答： Rahul 2024-9-6
I have a 1-D array (1*11). I need to make it a 4D matrix (11*11*11*11). The number of data (11) for each dimension are the same. For example, the 1-D array is A=0:1:10. This A needs to be turned into 4-D matrix. How can I do that? How to write the code for that?
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Rik
Rik 2023-5-15
The question is much too light on details to conclude this, but I suspect the final answer will include a call to meshgrid or ndgrid. All depends on what OP actually wants to happen.

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Rahul
Rahul 2024-9-6
Hi @ANANTA BIJOY BHADRA,
I understand that you wish to obtain a 4-D Matrix from a 1-D Matrix of 11 data elements.
Taking the example of A=0:1:10, we can obtain the 11 x 11 x 11 x 11 matrix using 'ndgrid' function.
Here's how you can achieve it:
A = 0:1:10;
% Use 'ndgrid' to expand A into 4D
[B1, B2, B3, B4] = ndgrid(A, A, A, A);
% These 4 B1, B2, B3, B4 can be combined in any desired way to obtain
% desired result.
% For Example:
B = B1 + B2 + B3 + B4;
You can refer to the following MATLAB documentations to know more about these functions:
'ndgrid': https://www.mathworks.com/help/releases/R2024a/matlab/ref/ndgrid.html?searchHighlight=ndgrid&s_tid=doc_srchtitle
'meshgrid': https://www.mathworks.com/help/releases/R2024a/matlab/ref/meshgrid.html?searchHighlight=meshgrid&s_tid=doc_srchtitle
Hope this helps! Thanks.

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