How to repeat rows in fields of structure

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Mukund 2018-11-21

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https://ww2.mathworks.cn/matlabcentral/answers/431190-how-to-repeat-rows-in-fields-of-structure

编辑： Guillaume 2018-11-22

The existing strucure has to be expanded along rows of fields. The actual structure contains many fieldsnames and rows in them.

s.a=[1;2;3];
s.b=[9 1; 5 4; 3 7];

The rows have to be repeated to certain number of rows say 53.

I have used arrayfun and repmat, but error of size mismatch is shown.

Without use of for loop, how is it possible.

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Answer 1

Guillaume 2018-11-21

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https://ww2.mathworks.cn/matlabcentral/answers/431190-how-to-repeat-rows-in-fields-of-structure#answer_348217

编辑：Guillaume 2018-11-22

在 MATLAB Online 中打开

Note that practically, there is no difference between arrayfun, structfun, etc. and a loop. If anything, arrayfun can be slower than a loop.

I suspect that what you want is structfun which applies the same function to each field of the structure:

news = structfun(@(fld) repmat(fld, 53, 1), s, 'UniformOutput', false)

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Mukund 2018-11-22

在 MATLAB Online 中打开

Another error: Undefined function or variable 'field'. Error in @(fld)repmat(field,53,1). Correction:

news=structfun(@(field)repmat(field,53,1),s,'UniformOutput',false)

However, rows in field reaches to 159 instead of 53.

Guillaume 2018-11-22

Sorry yes, I changed the name of the variable midway through the function. I must have been tired when I wrote that answer.

I'm not actually sure I understood what you actually want to do with each field. I thought you wanted to replicate the rows 53 times. If that's not what you want to do, you need to change the body of the function used in structfun to do what you actually want to do.

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