generate a random number according to a probability distribution

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MichMichel 2013-2-28

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Hello everyone! :)

I am trying to generate a random number according to a probability distribution that I create. Let me explain:

I have a matrix p (2 * n): p : row 1: 1 2 3 4 5 row 2: 0.1 0.1 0.6 0.2 0

I want to get a number randomly according to the distribution p (2, :) to be able to 1,2,3,4 or 5.

Do you know of a function that can do this in matlab?

Thank you very much

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Walter Roberson 2013-2-28

if p(2,5) is 0, then how would 5 be generated?

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Tom Lane 2013-2-28

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Check out the datasample function, including its 'Weights' argument.

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Image Analyst 2013-2-28

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You can probably find the code for it in this File Exchange submission:

http://www.mathworks.com/matlabcentral/fileexchange/7309-randraw

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AI and Statistics Statistics and Machine Learning Toolbox Probability Distributions Continuous Distributions Uniform Distribution (Continuous)

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