How to read specific fields from multiple structure arrays in MATLAB?

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Jay 2013-2-20

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采纳的回答： Azzi Abdelmalek

在 MATLAB Online 中打开

Hello,

I have a very large dataset arranged into multiple structure arrays in MATLAB. The structures look something like this:

 Flight1=   
     .testpoint = 1
     .Mach = 0.8
     .Speed = 300
     .Cieling = 35000
     .Data = [A] % A is an MxN matrix

Similarly there are multiple test points for multiple flights. Is there a way to retrieve the Data of only specified test points? For example I want to plot and compare the Data of ALL the test points whose .Mach = 0.8 or where .testpoint = 2?

I hope I have made it clear enough.

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Azzi Abdelmalek 2013-2-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/64281-how-to-read-specific-fields-from-multiple-structure-arrays-in-matlab#answer_75871

编辑：Azzi Abdelmalek 2013-2-20

在 MATLAB Online 中打开

idx=cellfun(@(x,y) x==2 |y==0.8,{Flight1.testpoint},{Flight1.match})
%idx is the index that fit your conditions

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Azzi Abdelmalek 2013-2-20

编辑：Azzi Abdelmalek 2013-2-20

在 MATLAB Online 中打开

for k=1:10
    s=sprintf('Flight%d',k)
    Flight1=load(s)
    idx=cellfun(@(x,y) x==2 |y==0.8,{Flight1.testpoint},{Flight1.match})
    out=Flight1(idx)
    v{k}={out.testpoint}
end