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Create empty dataset array

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Vanessa
Vanessa 2017-4-26
评论： KSSV 2017-4-26
Hello everyone,
How Can I Pre allocate memory for a DATASET ARRAY which should have 274 Columns. There is another dataset array with the same columns in my workspace .The rows of the new dataset array differs every time the code run based on date. Can you help me with that?
Thanks, Vanessa
  2 个评论
KSSV
KSSV 2017-4-26
The rows of the new dataset array differs every time the code run based on date whats the criteria here?
Vanessa
Vanessa 2017-4-26
every hour new data are fetched from a database the number of them is not known so when the code run i cannot preallocate the size of array.

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回答（1 个）

KSSV
KSSV 2017-4-26
You can follow something like this:
n = 10 ; % number of columns
A = zeros([],n); % rows not known
for ii = 1:100
A(ii,1:n) = rand(1,n);
end
  2 个评论
Vanessa
Vanessa 2017-4-26
Thank u for your help!
KSSV
KSSV 2017-4-26
thanking is accepting the answer.

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