How can I set the values of matrix in interval <a, b>?

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Ihor 2022-12-4

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评论： DGM 2022-12-4

Generate a matrix Ru of pseudo-random floating point values from a uniform distribution, a matrix Ri of pseudo- random integer

values from a uniform distribution and a matrix Rn of pseudo-random values from a normal distribution. Let the size of all

matrices be M x N. Let the expected value of Rn be m = 8 and variance v = 3. Let the values of Ru an Ri be from the interval < a,

b > = < 4, 9 >.

Rn = rand( M, N ) ;
Ru = randn( M, N) ;
Ri = randi( [a, b], M, N ) ; % here I know how to set the interval <a, b>

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Stephen23 2022-12-4

编辑：Stephen23 2022-12-4

在 MATLAB Online 中打开

Original question by Ihor retrieved from Google cache:

https://web.archive.org/web/20221204175043/https://webcache.googleusercontent.com/search?q=cache:WKaFs5JO6NsJ:https://www.mathworks.com/matlabcentral/answers/1870617-how-can-i-set-the-values-of-matrix-in-interval-a-b

https://web.archive.org/web/20221204175257/https://www.mathworks.com/matlabcentral/answers/1870617-how

How can I set the values of matrix in interval <a, b>?

Generate a matrix Ru of pseudo-random floating point values from a uniform distribution, a matrix Ri of pseudo- random integer

values from a uniform distribution and a matrix Rn of pseudo-random values from a normal distribution. Let the size of all

matrices be M x N. Let the expected value of Rn be m = 8 and variance v = 3. Let the values of Ru an Ri be from the interval < a,b > = < 4, 9 >.

Rn = rand( M, N ) ;
Ru = randn( M, N) ;
Ri = randi( [a, b], M, N ) ; % here I know how to set the interval <a, b>

Rik 2022-12-4

I recovered the removed content from the Google cache (something which anyone can do). Editing away your question is very rude. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer.

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Answer 1

DGM 2022-12-4

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https://ww2.mathworks.cn/matlabcentral/answers/1870617-how-can-i-set-the-values-of-matrix-in-interval-a-b#answer_1119697

编辑：DGM 2022-12-4

在 MATLAB Online 中打开

Start with:

m = 500;
n = 500;
rrange = [4 9];
mn = 8;
vr = 3;
% uniform distribution with a specified range
Ru = rrange(1) + range(rrange)*rand(m,n);
[min(Ru(:)) max(Ru(:))]
ans = 1×2
    4.0000    9.0000
% normal distribution with specified mean, variance
Rn = mn + sqrt(vr)*randn(m,n);
[mean(Rn(:)) var(Rn(:))]
ans = 1×2
    7.9939    3.0058
% discrete uniform random integers
Ri = randi(rrange,m,n);
[min(Ri(:)) max(Ri(:))]
ans = 1×2
     4     9