I would like to concatenate arrays inside a loop.. how can I do it ?
Best Answer
Easy, given any number of arrays in a cell arrayC. You could use a loop like this, although it is inefficient because theoutput array is not preallocated:
C = {[1,2],[3,4],...} % cell array of arrays.
A = C{1};
for k = 2:numel(C)
A = [A;C{k}];
end
Simpler and more efficient would be to concatenate them all at once, without a loop, e.g.:
A = vertcat(C{:})
Whatever you do, do NOT try to access variable names dynamically in a loop! Read this to know why:
Simply store the data inone structure, and then it is trivially easy (no slow, buggyeval is required):
>> S.a = [1,2,3];
>> S.b = [2,3,4];
>> C = {'a','b'};
>> S.(C{1})
ans =
1 2 3
Simpler code through better code design: faster, neater, simpler, more efficient, easiest to debug, less complex. Why waste your time learning bad ways to write code?:
Best Answer