Gamma

greybox.distributions.dgamma(q, shape=1, scale=1, log=False)

Gamma distribution density.

Parameters:

• q (array_like) – Quantiles (must be positive).

• shape (float) – Shape parameter (alpha).

• scale (float) – Scale parameter (theta).

• log (bool) – If True, return log-density.

Returns:

Density values.

Return type:

array

greybox.distributions.pgamma(q, shape=1, scale=1)

Gamma distribution CDF.

Parameters:

• q (array_like) – Quantiles.

• shape (float) – Shape parameter.

• scale (float) – Scale parameter.

Returns:

CDF values.

Return type:

array

greybox.distributions.qgamma(p, shape=1, scale=1)

Gamma distribution quantile function.

Parameters:

• p (array_like) – Probabilities.

• shape (float) – Shape parameter.

• scale (float) – Scale parameter.

Returns:

Quantile values.

Return type:

array

greybox.distributions.rgamma(n, shape=1, scale=1)

Gamma distribution random number generation.

Parameters:

• n (int) – Number of observations.

• shape (float) – Shape parameter.

• scale (float) – Scale parameter.

Returns:

Random values.

Return type:

array