creating a variable to use for grouping data

I want to create a variable (a column vector) with a specific length (8000), containing values 1 to 10 randomly assigned and with a specific average repetition of each number (say 800). How to do this?

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Walter Roberson
Walter Roberson 2012 年 4 月 20 日

1 投票

If the number of repetitions is to be exact:
t = repmat(1:10.', 800, 1);
t(randperm(length(t)))
If the repetitions need not be exact:
1 + floor(10 * rand(8000,1))

2 件のコメント

Rabeya
Rabeya 2012 年 4 月 20 日
Very impressive!
Walter Roberson
Walter Roberson 2012 年 4 月 20 日
Opps, I had an extra layer of repmat() on the first solution! I have edited.

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