MATLAB 生成随机数 [英] MATLAB generate random numbers

问题描述

您好，我正在尝试在 MATLAB 中生成具有随机 MEAN 值的随机数.

Hi I am trying to generate random numbers in MATLAB with a random MEAN value.

例如，如果我使用

e = mean(rand(1000,1))

e 的答案总是接近 0.5.我想要的是 e (mean) 的值是随机的，这样 e 可以是 0.1, 0.2, 0.3 等等...

the answer for e will always be close to 0.5. What I want is for the value of e (mean) to be random, so that e can be 0.1, 0.2, 0.3, etc...

我使用是否正确e = mean(unifrnd(0,1,[1000,1])) ?

谢谢

推荐答案

也许你想生成正常分布的随机数X~N(0,1)用a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/randn.html" rel="nofollow noreferrer">randn.然后您可以将平均值和标准差更改为随机的.举个例子:

Perhaps you want to generate normally distributed random numbers X~N(0,1) with randn. Then you can change the mean and standard deviation to be random. As an example:

N = 1000;
mu = rand*10 - 5;            %# mean in the range of [-5.0 5.0]
sigma = randi(5);            %# std in range of 1:5
X = randn(N, 1)*sigma + mu;  %# normally distributed with mean=mu and std=sigma

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