Create structs with different number of columns

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civil tech
civil tech 2020-11-4
评论： civil tech 2020-11-4
Hi.
Assume that I have a parameter n, that has no constant value.
I want to cretae a single structure with n columns and m rows (m is constsnt) in each iteration of a loop. How can I do this? Note that in each loop, the parameter n is changed, so, the structures have no constant column.
Thanks in advance.

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回答（1 个）

Walter Roberson
Walter Roberson 2020-11-4
This is not possible if you are referring to struct array and columns refers to the second dimension. For example if you had
s = struct('hello', 5);
s(1,5).hello = true;
Then you could not say that for s(2,:) you only want 3 columns.
You could store each struct inside a cell array.
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Walter Roberson
Walter Roberson 2020-11-4
When you want to access the K'th field, then fn{K} holds its name.
The code might be rather different if you had a small maximum bound on n making it practical to define allowed field names in advance

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