Interpolate missing values in a time seriesSource:
By default, uses linear interpolation for non-seasonal series. For seasonal series, a robust STL decomposition is first computed. Then a linear interpolation is applied to the seasonally adjusted data, and the seasonal component is added back.
Box-Cox transformation parameter. If
lambda="auto", then a transformation is automatically selected using
BoxCox.lambda. The transformation is ignored if NULL. Otherwise, data transformed before model is estimated.
Should a linear interpolation be used.