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Posted: **Fri Dec 05, 2008 9:12 am**

I have a series y and want to regress it like an AR(x) model.
I can type "ls y AR(1) AR(2)... AR(x)"
but in programming can I do something like "ls y AR(1:x)"?
This specific notation does not work.
I hope it is clear what I want to do. I now have:

Code: Select all


vector(20) hs
equation eq
for !i=1 to 20
eq.ls y AR(!i)
hs(!i) = eq.@aic
next

How to edit this so that I obtain the @aic values for regressions on
AR(1),
AR(1) AR(2)
,...,
AR(1),...,AR(20)?

Posted: **Fri Dec 05, 2008 10:24 am**

You'll have to use two for loops, one inner loop to build up the string with the AR terms:

Code: Select all


vector(20) hs
equation eq
for !i=1 to 20
%regs=""
for !j=1 to !i
%regs = %regs + "ar(" + @str(!j) + ") "
next
eq.ls y {%regs}
hs(!i) = eq.@aic
next

Posted: **Fri Dec 05, 2008 11:28 am**

Thank you!

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