message_ix_models.model.material.util.exponential

message_ix_models.model.material.util.exponential(x: float | list[float], b: float, m: float) → float[source]

Emulates Excels GROWTH function

Parameters:

  • x – domain of function

  • b – function parameter b

  • m – function parameter m

Returns:

function value for given b, m and x

Return type:

float | list[float]