Generate poisson random number with a mean and standard deviation

Question

Laura 2016-8-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/300465-generate-poisson-random-number-with-a-mean-and-standard-deviation

回答： James Tursa 2016-8-22

I want to generate poisson random number with a mean of 1 and standard deviation of 0.2 for 60 numbers. I could not find anywhere that can input the standard deviation into it. I also have a problem with command poissrnd that it only gives integer instead of decimal number.

If anyone has a routine to do that, please share Thanks.

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Answer 1

James Tursa 2016-8-22

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/300465-generate-poisson-random-number-with-a-mean-and-standard-deviation#answer_232476

See this:

https://en.wikipedia.org/wiki/Poisson_distribution

And this:

http://www.mathworks.com/help/stats/poisson-distribution.html

There is only one parameter for the Poisson distribution, lambda, and that sets both the mean and the variance of the distribution. You can't independently set the mean and variance differently, which you are apparently trying to do. Why do you want/need to do that?