How to define some orders in ARIMA

I want to define an ARIMA(1,0,8) but I only want the model to find the optimal values for first and last MA orders in a way that for MA component orders from 2 to 7 are zero.How should I change the following function?

model = arima(p,0,q);

Answer 1

[Shashank Prasanna]

This should do the trick:

arima('ARLags',1,'MALags',[1 8])

ans =

    ARIMA(1,0,8) Model:
    --------------------
    Distribution: Name = 'Gaussian'
               P: 1
               D: 0
               Q: 8
        Constant: NaN
              AR: {NaN} at Lags [1]
             SAR: {}
              MA: {NaN NaN} at Lags [1 8]    <--------
             SMA: {}
        Variance: NaN

http://www.mathworks.com/help/econ/arimaclass.html