Random numbergeneration with constraints
1 回表示 (過去 30 日間)
古いコメントを表示
Hi,
I want to generate a random matrix, with two constraints 1.the sum of each row of the matrix is less or equal to let's say 60. 2.And the values must be within a specified range, say between 10 and 20.
Can anyone help me with this?
Thank you so much for your help!
0 件のコメント
採用された回答
Tom
2012 年 7 月 5 日
ulim=20; %max value
llim=10; %min value
rowlim=60; %max sum for each row
m=5; %rows
n=4; %columns
RMat=rand(m,n)*(ulim-llim)+llim;
Rsum=sum(RMat,2);
Rcheck=Rsum>rowlim;
while any(Rcheck) %replace any row whose sum is > rowlim
I=find(Rcheck);
RMat(I,:)=rand(length(I),n)*(ulim-llim)+llim;
Rsum=sum(RMat,2);
Rcheck=Rsum>rowlim;
end
disp(RMat)
その他の回答 (2 件)
Nirmal
2012 年 7 月 5 日
What happens if number of columns is something large may be 20? it would definitely cross your constraint of 60. if you plot the histogram of random numbers every number are equally likely. if you set the number of columns to be within certain limit based on your limit on the sum you can achieve what you are looking for, otherwise the number you will generate will not be random.
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Creating and Concatenating 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!