what is wrong with this simple code?

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Sergio
Sergio 2013-7-4
Hi I am trying to create an empty array so that I can add elements to it concatenating them. This avoid the large time it takes if you dont give it a size previous the for loop, as it has to change its size at every iteration. This is the code:
>> days=double.empty(100000,1,0); m=size(days); m
for k=2:numel(UntitledCase_Temp)
days(k)=(UntitledTime(k)-UntitledTime(k-1))/24*3600+days(k-1);
end;
m =
100000 1 0
??? Attempted to access days(1); index out of bounds because numel(days)=0.

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the cyclist
the cyclist 2013-7-4
Preallocate like this instead
days = zeros(100000,1);

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