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

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Image Analyst
Image Analyst 2015-6-5
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.

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Ingrid
Ingrid 2015-6-5

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

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