Preallocate memory for the rows of each field inside a structure

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L_Del
L_Del 2019-7-2
编辑： Stephen23 2019-7-2
Hi all
This should be pretty easy but I can't seem to find the right way to do this...
I have this structure, each of its fields are preallocated so field 1 = [ ], same for the rest. I'm filling the rows of each field one at a time so Matlab is complaining that I should preallocate the rows first. I tried nameofstructure(1:900).field1=[ ] but this doesn't work. I've also tried with the curly brackets with no avail.
What's the correct way to preallocate the rows once the fields have been preallocated? Thanks!
LD

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回答（1 个）

Stephen23
Stephen23 2019-7-2
编辑：Stephen23 2019-7-2
This should get you started:
>> S = struct('F',{[],[],[]});
>> S.F
ans =
[]
ans =
[]
ans =
[]
>> [S.F] = deal(zeros(3,5));
>> S.F
ans =
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
ans =
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
ans =
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
See:
https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

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