I can solve this error

Mdl = arima('Constant',0,'D',1,'Seasonality',12,...
    'MALags',1,'SMALags',12);
EstMdl = estimate(Mdl,y);

There is this error:

[Image Analyst]

Why do you think you should have a function called arima? I don't. It's not part of MATLAB or any toolbox that I have. You obviously did not write this code or you wouldn't have written arima, so you need to go back to the person you got this code from and ask for that function.

Answer 1

[Ingrid]

I do have this function available, it is part of the econometrics toolbox

[abduall hassn]

yes u r right