How to store specific data from structure (substructure)?

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kubyk 2014-4-8

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https://ww2.mathworks.cn/matlabcentral/answers/125032-how-to-store-specific-data-from-structure-substructure

评论： Dishant Arora 2014-4-8

采纳的回答： Dishant Arora

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Hi,

I have large dataset in structure arrays. Hundred of subctructures (1x100), it looks like

 data = 1x100 struct array with fields:
    timestamp (not interesting)
    stimIndex (not interesting)
    stim (not interesting)
    signal (column of samples - important)

I would like to store just with signal (data(1,1).signal, data(1,2).signal....data(1,100).signal). I don´t know how to make the loop, which will store just the signal data and do it hundreds of times. 100 dataset - 100 file. I hope it is quite clear.

Many thanks for tips

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Answer 1

Dishant Arora 2014-4-8

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That is already stored but if you want it to store in another non struct variable, you need not use a loop. follow this:

Signal = {data.signal} % will result in cell array

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kubyk 2014-4-8

According to your tip, I have matrix 1x100 and each element contains my signal. That is good but now I don´t know how to work with that. For example I would like to do sum of this signals (like averaging).

I thought the FOR loop will be usefull. I wanted make folder with 100 signal files and then work with signals separately.

Dishant Arora 2014-4-8

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That results in a cell array not a matrix. You can access individual signals using:

mat = Signal{1}; % Access 1st signal

Go through the attached link to know more about cell arrays, like how to access individual element or how to operate on them http://www.mathworks.in/help/matlab/cell-arrays.html

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