statsmodels.tsa.ar_model.AR

class statsmodels.tsa.ar_model.AR(endog, dates=None, freq=None, missing='none')[source]

Autoregressive AR(p) model

Parameters
  • endog (array-like) – 1-d endogenous response variable. The independent variable.

  • dates (array-like of datetime, optional) – An array-like object of datetime objects. If a pandas object is given for endog or exog, it is assumed to have a DateIndex.

  • freq (str, optional) – The frequency of the time-series. A Pandas offset or ‘B’, ‘D’, ‘W’, ‘M’, ‘A’, or ‘Q’. This is optional if dates are given.

  • missing (str) – Available options are ‘none’, ‘drop’, and ‘raise’. If ‘none’, no nan checking is done. If ‘drop’, any observations with nans are dropped. If ‘raise’, an error is raised. Default is ‘none.’

Methods

fit([maxlag, method, ic, trend, …])

Fit the unconditional maximum likelihood of an AR(p) process.

from_formula(formula, data[, subset, drop_cols])

Create a Model from a formula and dataframe.

hessian(params)

Returns numerical hessian for now.

information(params)

Not Implemented Yet

initialize()

Initialize (possibly re-initialize) a Model instance.

loglike(params)

The loglikelihood of an AR(p) process

predict(params[, start, end, dynamic])

Returns in-sample and out-of-sample prediction.

score(params)

Return the gradient of the loglikelihood at params.

select_order(maxlag, ic[, trend, method])

Select the lag order according to the information criterion.

Attributes

endog_names

Names of endogenous variables

exog_names