statsmodels.tsa.deterministic.TimeTrend.from_string¶

classmethod TimeTrend.from_string(trend)[source]¶

Create a TimeTrend from a string description.

Provided for compatibility with common string names.

Parameters:¶

trend{“n”, “c”, “t”, “ct”, “ctt”}

The string representation of the time trend. The terms are:

• “n”: No trend terms

• “c”: A constant only

• “t”: Linear time trend only

• “ct”: A constant and a time trend

• “ctt”: A constant, a time trend and a quadratic time trend

Returns:¶

TimeTrend

The TimeTrend instance.