How to vertically concatenate certain fields of a structure on each pass of a loop?

Question

Nicholas Kavouris 2022-6-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1746760-how-to-vertically-concatenate-certain-fields-of-a-structure-on-each-pass-of-a-loop

回答： Matt J 2022-6-23

i have a series of functions i need to analyze .txt files and pull relevant data for example, with the output from 'analyzedata' being a structure. How can i concatenate the results from each file to the results from previous files?

i want final to be a struct with the fields below, with those fields populated with the values from each loop of 'analyze data'

fields={'duration','temperture','RPM'}
final=struct(fields)
for k=1:numel(files)
    .....
    [data]=pulldata(filename)
    [results]=analyzedata(data)
    
end

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dpb 2022-6-23

A structure array or a structure containing arrays? Two different things...

I'd ask why the structure and not a table, though??? Would fit very nicely and be as easy or easier to address.

Nicholas Kavouris 2022-6-23

a table would work for the final results, but the results of my analysis function contain a few arrays which are best suited to a structure.

i do not understand why it is so difficult to concatenate results from one field into another structure

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Answer 1

Matt J 2022-6-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1746760-how-to-vertically-concatenate-certain-fields-of-a-structure-on-each-pass-of-a-loop#answer_992155

在 MATLAB Online 中打开

clear results
for k=numel(files):-1:1
    .....
    data=pulldata(filename);
    results(k)=analyzedata(data);
    
end
for f=string(fieldnames(results)')
    
    final.(f)=vertcat(  results.(f) );
    
end