Return field in struct whose field name contains a string

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Cody Brown
Cody Brown 2021-4-13
回答： Cris LaPierre 2021-4-13
i have a struct like the following:
Struct.Data.FieldOne %1000x2 double
Struct.Data.FieldTwo %1000x2 double
Struct.Data.FieldThree %1000x2 double
I want to return the field that contains a string, like the following:
Two = find(Struct.Data, 'Two'); %I don't know what this function would be
that is equevelent to:
Two = Struct.Data.FieldTwo;

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回答（1 个）

Cris LaPierre
Cris LaPierre 2021-4-13
Ran in:
One way is to use the functions fieldnames and contains.
Struct.Data.FieldOne =1;%1000x2 double
Struct.Data.FieldTwo =2;%1000x2 double
Struct.Data.FieldThree =3;%1000x2 double
% get field names
nm = fieldnames(Struct.Data)
nm = 3×1 cell array
{'FieldOne' } {'FieldTwo' } {'FieldThree'}
% find which field contains the search string
ind = contains(nm,'Two')
ind = 3×1 logical array
0 1 0
% Dynamically extract the data
two = Struct.Data.(nm{ind})
two = 2
Note that this approach will only work when there is a single match.

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