%% Default MA Model
% This example shows how to use the shorthand arima(p,D,q) syntax to specify the default MA
% {y_t} = c + {\varepsilon _t} + {\theta _1}{\varepsilon _{t - 1}} +  \ldots  + {\theta _q}{\varepsilon _{t - q}}.
% By default, all parameters in the created model object have unknown values, and the innovation distribution is Gaussian with constant variance.
% Specify the default MA(3) model:

Mdl = arima(0,0,3)

% The output shows that the created model object, Mdl, has NaN values for all model parameters: the constant term, the MA 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.