mtalg.random.lognormal

lognormal(mean: Number = 0.0, sigma: Number = 1.0, size: int | tuple | None = None) → ndarray | Number[source]

Draw from a lognormal distribution.

Parameters:

  • mean – Mean value of the underlying normal distribution. Default is 0.

  • sigma – Standard deviation of the underlying normal distribution. Must be non-negative. Default is 1.

  • size – Output shape.

Returns:

numpy.ndarray or scalar.