How to find a string in the following cell structure?

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Mr M.
Mr M. 2018-10-15
编辑： Stephen23 2018-10-15
I have s{1}.name = 'abc', s{2}.name = 'xyz', ..., s{n}.name = 'something'. And I would like to know the existance of a strin mystr ='aaa' among these names, and its index. Is it possible to do without a for cycle?

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回答（2 个）

madhan ravi
madhan ravi 2018-10-15
编辑：madhan ravi 2018-10-15
index = find(strcmp({structname.field}, 'string')==1)
Read the link below: https://www.mathworks.com/matlabcentral/answers/32166-find-a-string-element-in-a-structure-matrix#answer_202066
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Mr M.
Mr M. 2018-10-15
编辑：Mr M. 2018-10-15
dot indexing is not supported for variables of this type
synatax error:
mparams{1}.name = 'a'; params{1}.value = 13; params{2}.name = 'b'; params{2}.value = 42; {params.name}

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Stephen23
Stephen23 2018-10-15
编辑：Stephen23 2018-10-15
Storing lots of separate scalar structures in a cell array is less convenient than just using one non-scalar structure. You should replace the cell array of scalar structures with one single non-scalar structure, then your task is trivial:
c{1}.name = 'abc';
c{2}.name = 'xyz';
c{3}.name = 'something';
s = [c{:}] % convert cell of scalar structures to non-scalar structure.
x = strcmp('xyz',{s.name})
Even better would be to avoid the cell array entirely, and just use a non-scalar structure right from the start:
s(1).name = 'abc';
s(2).name = 'xyz';
s(3).name = 'something';
x = strcmp('xyz',{s.name})
Read more about how this works:
https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html
https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

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