Random number distributions

The following functions map directly to C functions from the GNU Scientific Library. All functions take positional arguments without names.

fwdpy11.gsl_ran_gaussian_ziggurat()

Parameters:

• rng (fwdpy11.GSLrng) – Random number generator

• sd (float) – The standard deviation

Returns:

A gaussian deviate with mean zero and standard deviation sd

Return type:

float

fwdpy11.gsl_rng_uniform()

Parameters:

rng (fwdpy11.GSLrng) – Random number generator

Returns:

Uniform deviate from the range [0, 1)

Return type:

float

fwdpy11.gsl_ran_flat()

Parameters:

• rng (fwdpy11.GSLrng) – Random number generator

• a (float) – Lower bound of range, inclusive.

• b (float) – Upper bound of range, exclusive.

Returns:

Uniform deviate from the range [a, b).

Return type:

float

fwdpy11.gsl_ran_poisson()

Parameters:

• rng (fwdpy11.GSLrng) – Random number generator

• mean (float) – The mean of the distribution

Returns:

The number of successes

Return type:

int

fwdpy11.gsl_ran_geometric()

Parameters:

• rng (fwdpy11.GSLrng) – Random number generator

• p (float) – The probability of success

Returns:

The waiting time until the next success

Return type:

int