how to index a cell array
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Hi, I encountered a Matlab problem again. I want to access all struct field elements, which is an element of a cell array, at one time, not using loop. Such as:
s{1} = struct('ID',1,'other field',...);
s{2} = struct('ID',2,'other field',...);
I want to access all ID values in the cell s, I write the code like this:
IDs = [s{:}.ID];
This does not work, how to access all ID values not using for loop, please?
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Stephen23
2018년 5월 23일
If you used just one non-scalar structure (rather than lots of scalar structure in a cell array) then the solution would be very simple:
S(1) = struct('ID',1,'other field',...);
S(2) = struct('ID',2,'other field',...);
[S.ID]
Simpler, more efficient code through better data design. Why make your code more complex than this?
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Ameer Hamza
2018년 5월 23일
You can do this in Two steps
temp = [s{:}];
allIDValues = [temp.ID];
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Stephen23
2018년 5월 23일
Note that in Ameer Hamza's answer the first line of code converts your cell array of scalar structures into one non-scalar structure. If you had stored your data in a non-scalar structure in the first place, then you would not need this extra step.
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