Concatenating data from structure array for plotting

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Bob Thompson
Bob Thompson 2019-1-8
编辑： Stephen23 2022-8-19
I have a structure array with several levels of depth that I am trying to extract a specific set of data from in order to plot it. The plan is to draw individual elements from several different fields, and then combine them into a single array for plotting. I know that normally structures can be concatenated using [], but it doesn't seem to be working for this instance.
plot(x_values,[files([files.Param] == condition).Zone(1).Values(1,4)]);
Expected one output from a curly brace or dot indexing expression, but there were multiple results.
I know that the inner conditional statement is working, as I can extract it and get the appropriate logic matrix, but that means that I am looking at multiple elements of 'files' (which is exactly what I want to do), but they do not seem to be concatenating properly. Any suggestions would be appreciated.

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Stephen23
Stephen23 2019-1-8
编辑：Stephen23 2019-1-8
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Stephen23
Stephen23 2019-1-9
编辑：Stephen23 2019-1-9
As I mentioned earlier, working with nested functions is not much fun.
You could try something like this:
fun = @(s) s.Zone(1).Values(1,4);
V = arrayfun(fun,files([files.Param]==condition))
Bob Thompson
Bob Thompson 2019-1-9
编辑：Bob Thompson 2019-1-9
That should be sufficient for this, thanks.
And in the future I know better how to avoid this whole situation, so double thanks.

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更多回答（1 个）

Mehmet Burak Ekinci
You may use custom matlab functions from file exchange to get values from nested struct arrays
https://www.mathworks.com/matlabcentral/fileexchange/116130-matlab-struct-operations
See Answer in link for example.
https://www.mathworks.com/matlabcentral/answers/331374-how-can-i-plot-nested-structure-fields

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