Variable size changes on every iteration

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Aftab Ahmed Khan
Aftab Ahmed Khan 2014-6-5
评论： José-Luis 2014-6-5
Hi,
What is an efficient way of doing the following task.
departure_time(1) = 250;
file_arrival(1) = 0.0;
for i = 2:30
departure_time(i) = arrival_time(i)+transmission_time(i)+departure_time(i-1);
end
This code is working fine for me but the matlab script editor show the message that "the variable departure_time changes size on every loop iteration. I am sure that there will be another way of achieving the same task, right?
Thank you so much.

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José-Luis
José-Luis 2014-6-5
编辑：José-Luis 2014-6-5
Pre-allocate. Before departure(1) = 250, place:
departure_time = NaN .* ones(30,1);
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Aftab Ahmed Khan
Aftab Ahmed Khan 2014-6-5
Thanks for the explanation, Accepted.
Cheers.

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