Dynamic call to structure elements
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Tom Dollfus
il 8 Lug 2020
I intend to use a for loop to process iterative computation on different elements of a structure; my structure is made of:
- MyStruct.Elmt1
- MyStruct.Elmt2
- MyStruct.Elmt3
- ...
How can I dynamicaly call each element of my structure (incrementing the number : Elmt1, Elmt2,...) in order to use it in a for loop?
Thanks
1 Commento
Stephen23
il 8 Lug 2020
Spostato: Stephen23
il 8 Dic 2023
You can trivially access the fields of a structure using this syntax, where F is the fieldname:
S.(F)
You could use sprintf to generate the fieldnames, e,g.:
idx = 1;
fnm = sprintf('Elmt%u',idx);
MyStruct.(fnm)
Note that your code would be simpler and more efficient if you used a non-scalar structure, e.g.:
S(1).Elmt = 1;
S(2).Emlt = 22;
S(3).Emlt = 333;
then you can trivially access any element of that structure array using basic, efficeint indexing:
idx = 1;
S(idx).Emlt
Risposta accettata
Walter Roberson
il 8 Lug 2020
for K = 1 : 3
MyStruct.(sprintf('Elmt%d', K))
end
or
for K = 1 : 3
MyStruct.("Elmt"+K) %rely on string objects
end
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