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Add gaussian distributed noise with mean and variance to matrix

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monkey_matlab
monkey_matlab 2015-11-5
评论： Muhammad Yasir 2021-7-14
Hello,
I've seen that to add gaussian distributed noise to a matrix A with mean 0 and var = 5, this is the code
A_wnoise = A + 5*randn(size(A))
Now, how do you add noise with mean 5 and var = 5 to the matrix A? Thanks.

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Image Analyst
Image Analyst 2015-11-5
A_wnoise = A + 5*randn(size(A)) + 5;
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Deryk Smith
Deryk Smith 2020-8-13
What if your variance is supposed to be (0:0.1:10)? the code does not work then.
Image Analyst
Image Analyst 2020-8-14
Variance can't be an array. However you can put one variance into randn() and put it into a loop over all variances to get a family of arrays.

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Muhammad Yasir
Muhammad Yasir 2021-7-12
How can I generate a noise sequence w_t, which is i.i.d. Gaussian of mean zero with variance 2I3 (2xI3 ,where I3 is identity matrix of dimension 3x3) and the initial condition is x_init = [10 10 −10]'
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Muhammad Yasir
Muhammad Yasir 2021-7-14
Sorry, I could post it immediately. I have posted this question as per your advice. Here is the link to my Query:
https://uk.mathworks.com/matlabcentral/answers/878528-how-to-generate-iid-gaussian-noise-vector

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