Initialize field values in a structure + create a list of zeros(10,10)

Question

The Gogo 2021-2-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/740422-initialize-field-values-in-a-structure-create-a-list-of-zeros-10-10

编辑： The Gogo 2021-2-9

Hi everyone, I want to initialize the same field for several indexes in a structure by some zeros(10,10), and I can't figure out how.

Already took me a while to figure out how to just initialize them to 0:

[test(5:9).field] = deal(0,0,0,0)

Which works but

I don't want to initialize by a scalar zero but by a 10x10 zeros matrixes
And obviously I don't want to repeat the

zeros(10,10)

as many times as I have indexes to initialize.

All the options I find are some kind of concatenation functions (for example repmat) which will obviously won't do the job.

There must be an easy an elegant way, but I can't seem to find it :/

Thanks in advance!

P.S.: and obviously, I'm not looking for a loop.

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Answer 1

The Gogo 2021-2-9

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/740422-initialize-field-values-in-a-structure-create-a-list-of-zeros-10-10#answer_618907

编辑：The Gogo 2021-2-9

在 MATLAB Online 中打开

CORRECTION: actually the correct answer is in the comments of this answer. by Stephen Cobeldick.

Ok, sorry I finally found the answer thanks to: https://www.mathworks.com/matlabcentral/answers/106681-initializing-a-struct-with-n-d-fields#answer_115699

test2 = cell(4,1);
test2(:) = zeros(10,10);
[test(5:9).field] = deal(test2);

Sorry for disturbing. I hope my struggle might be useful to some other people. If anyone has a shorter way, I'm still interested.

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Stephen23 2021-2-9

在 MATLAB Online 中打开

Simpler without the cell array:

mat = zeros(10,10);
[test(5:9).field] = deal(mat)
test = 1x9 struct array with fields:
    field
test(4).field
ans =

     []
test(5).field
ans = 10×10
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0