MATLAB: How to extract and organize data in a structure

cell arraysMATLABstructstructures

I have a 1×5574 structure in MATLAB and the first field is label and the second is message. The column of labels is either a 1 or a 0 and I am trying to extract all the data in message that corresponds to each label=1 and put that into a separate array. How would I do this?

Thanks for the help

-Mikaela

Best Answer

Where S is your structure, easily using two comma-separated lists:

X = [S.label]==1;
C = {S(X).message}

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You need to use concatenation brackets [ ]

a=[structname.MeansArea]

Read here: https://www.mathworks.com/help/matlab/ref/double.cat.html

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Use getfield with a comma-separated list:

a.b.c.d = pi;
x = {'b','c','d'};
getfield(a,x{:})
ans = 3.1416

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

Best Answer

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