how chose a number with unequal probability?

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Pappu Murthy
Pappu Murthy 2017-1-23
编辑： Matt J 2017-1-23
My question is if I use randi function and say between 1 : 100, it chooses randomly a number giving equal probability to all numbers in between. Suppose I want to chose a number between 1 and 100 but give different probability for each number say proportional to the number itself.. so that 1 has a much lower probability to pick compared to 100 for e.g. how would I do that with randi function? Is that possible at all? Thanks in advance for any help.

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采纳的回答

Steven Lord
Steven Lord 2017-1-23
Use the randsample function from Statistics and Machine Learning Toolbox with a vector of weights.

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Matt J
Matt J 2017-1-23
编辑：Matt J 2017-1-23
delta=1/(100*101/2);
probs=[0,cumsum((1:100)*delta)];
[~,~,theresult]=histcounts(rand,probs);

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