UNEMPTY

This function is useful if numeric values from a structure array are to be extracted using the notion M = S.field] UNEMPTY makes sure that empty matrices in the structure do not affect the size of M.

S = unempty(C) sets all occurences of empty matrices in all fields of C to NaN.

[S,nc] = unempty(C) reports the number of changed fields in nc.

S=unempty(C,F) sets in a structure array all occurences of empty matrices for field F to NaN.

S=unempty(C,F,value) sets all occurences of empty fields to value.

Example:

S=[struct('f',1) struct('f',2) struct('f',[]) ];
disp([S.f]) % size is different from S
1 2
S = unempty(S);
disp([S.f]) % size is the same as S
1 2 NaN