two dimension array mean and deviation calculation

6 ビュー (過去 30 日間)
wen
wen 2014 年 11 月 4 日
コメント済み: wen 2014 年 11 月 4 日
Hi, I have a two dimension array like X = normrnd([1 4;2 2;3 6;4 4;5 7;6 4;7 9;8 4;9 8;10 4],1); and I want to calculate the mean and standard deviation after several rounds. For example, I want to generate the array for 5 times, and I'd like to see the mean and standard deviation of each element, how can I do that?
Many thanks!

採用された回答

Mikhail
Mikhail 2014 年 11 月 4 日
There are a lot of ways to do that. I would generate 3D array, where the third dimension will be of the size = # of rounds (5);
So you will have array X(m,n,r), where r=1:5 (if number of rounds is 5).
Now, use mean and stddiv with second argument 3:
MeanX=mean(X,3); StddivX=stddiv(X,3);
This will calculate mean and stddiv through 3rd dimension. As a result you obtain two 2D arrays, what you were asking.
  2 件のコメント
Mikhail
Mikhail 2014 年 11 月 4 日
So X(:,:,1) is your first 2D array, X(:,:,5) - last, etc.
wen
wen 2014 年 11 月 4 日
thanks a lot!

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeShifting and Sorting Matrices についてさらに検索

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by