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randexp

randexp([rng], [dims...])

Generate a random number according to the exponential distribution with scale 1. Optionally generate an array of such random numbers.

Examples

1. Generate a single random number:

   julia> randexp()
   0.21863463412937835

   This example generates a single random number from the exponential distribution with scale 1.

2. Generate an array of random numbers:

   julia> randexp(3)
   3-element Array{Float64,1}:
   0.6534270514351252
   0.2677917751405643
   1.211819209742624

   It generates an array of 3 random numbers from the exponential distribution.

3. Generate random numbers using a specific random number generator:

   julia> rng = MersenneTwister(1234);  # Create a specific RNG
   julia> randexp(rng)
   1.8387810033340432

   This example uses a specific random number generator rng to generate a random number from the exponential distribution.

Common mistake example:

julia> randexp(-1)
ERROR: DomainError: The scale parameter of the exponential distribution must be positive

In this example, a negative value is provided as the scale parameter, which results in a domain error. It's important to provide a positive value for the scale parameter to ensure correct behavior of randexp.

See Also

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