MATLAB: Generate multiple random numbers in MatLab

exponentialmultiplerandomvariable

How do I generate multiple exponential random variables in matlab?

I know the code:

exprnd(mu)

but lets say I want 1000 random variables, how can I do this so I don't have to keep typing out "exprnd(mu)" 1000 times?

EDIT: Is it simple a matrix (like maybe 10 x 100 or something) and then there obviously would be a 1000 numbers in this matrix?

Best Answer

   mu = 1;  
   x = exprnd(mu,1000,1);
   hist(x)

MATLAB random number generators all work like this; this is documented in the command line help and the documentation. Have you read that?

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You need to do that since your exponential rate parameter varies. If it were constant, this would not be necessary. The first argument would just then be a scalar.

MATLAB: How am I to generate random numbers with exponential distribution applied

pd = makedist('Exponential','mu', 0.2);
r=0.5+random(pd)

but this gives you values with 0.5 + a random number if you want just the numbers that are bigger than 0.5 do this:

pd = makedist('Exponential','mu', 0.2);
r=0;
while r<0.5
r=random(pd);
end

Best Answer

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