writing normally distributed error code

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Lina Alhelo 2019-6-2

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编辑： Lina Alhelo 2019-6-3

采纳的回答： Bjorn Gustavsson

Hello all,

I have an equation

Y = aX + E.....

E is error term that is N ~ ( 0 , [ 25 0 ; 0 25] ) , how I can write a code for E in this case know that it will be 2 x1 matrix size. that is normally distibuted with 0 mean and 25 standard deviation

Thank you in advance.

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Bjorn Gustavsson 2019-6-3

在 MATLAB Online 中打开

I typically use something like this for scalar white noise with standard deviation proportional to the sqrt(intensity):

I = I_ideal + I_ideal.^.5*randn(size(I_ideal));

Maybe the documentation to normrnd gives you more information?

HTH

Lina Alhelo 2019-6-3

编辑：Lina Alhelo 2019-6-3

Thank you very much, your help was valuable.

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采纳的回答

Bjorn Gustavsson 2019-6-2

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Have a look at: randn, and normrnd.

HTH

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AI, Data Science, and Statistics Statistics and Machine Learning Toolbox Probability Distributions Continuous Distributions Noncentral t Distribution

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