%% Default AR Model
% This example shows how to use the shorthand arima(p,D,q) syntax to specify the default AR(p) model,
% {y_t} = c + {\phi _1}{y_{t - 1}} +  \ldots  + {\phi _p}{y_{t - p}} + {\varepsilon _t}.
% By default, all parameters in the created model object have unknown values, and the innovation distribution is Gaussian with constant variance.
% Specify the default AR(2) model:

Mdl = arima(2,0,0)

% The output shows that the created model object, Mdl, has NaN values for all model parameters: the constant term, the AR coefficients, and the variance. You can modify the created model object using dot notation, or input it (along with data) to estimate.
% Copyright 2015 The MathWorks, Inc.