Creating the uniform distribution on [0,2pi) for 1000 times

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yang-En Hsiao 2018-8-29

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https://ww2.mathworks.cn/matlabcentral/answers/416669-creating-the-uniform-distribution-on-0-2pi-for-1000-times

编辑： Stephan 2021-5-21

I want to Create the uniform distribution on [0,2pi) for 1000 times,and here is my code

      for n = 0:1:1000
          theta(n)=0+(2*pi)*rand(1,1)
      end

But matlab show me the warning: Subscript indices must either be real positive integers or logicals.I don't understand why does it show me this warning,can anyone tell me where am i wrong?

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Answer 1

Stephan 2018-8-29

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https://ww2.mathworks.cn/matlabcentral/answers/416669-creating-the-uniform-distribution-on-0-2pi-for-1000-times#answer_334541

编辑：Stephan 2018-8-29

在 MATLAB Online 中打开

Hi,

dont start with n=0:

 for n = 1:1:1000
     theta(n)=0+(2*pi)*rand(1,1);
 end

The better way (without loop) is following this and use:

theta = (2*pi)*rand(1,1000);

Best regards

Stephan

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Kinjal Macwan 2021-5-21

编辑：Kinjal Macwan 2021-5-21

@StephanI want to create 500 samples of a signal 𝑑(𝑛) = 𝑠𝑖𝑛 (𝜔0𝑛 +𝜃)

with 𝜔0= 0.05𝜋 and 𝜃 is a random variable that is uniformly distributed between –π and π.

How to write the theta from -pi to pi in this problem?

Stephan 2021-5-21

编辑：Stephan 2021-5-21

在 MATLAB Online 中打开

https://de.mathworks.com/help/matlab/math/random-numbers-with-specific-mean-and-variance.html

n = 500;

a = 2*pi;

theta = a.*rand(n,1)-pi;

histogram(theta)

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Creating the uniform distribution on [0,2pi) for 1000 times

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