lpdf

Exponential.lpdf(X)

Log of the Probability Density Function (LPDF).

The log-PDF for the two-parameter exponential distribution is:

\[\ln f(x | \alpha, \beta) = \ln(\alpha) - \alpha \cdot (x - \beta)\]

Parameters:

X (ArrayLike) – The input data points at which to evaluate the LPDF.

Returns:

The log-PDF values corresponding to each point in X.

Return type:

NDArray[np.float64]