number of positive obs and runs in series

[ch2324]

Hi everybody,
how can calculate number of positive obs in the series?
when i use this command message error "syntax error"

Code: Select all

scalar nobsp
nobsp=@obs(resid) if resid>0

have you an idea with this case.

[startz]

Code: Select all

series posSum = @sum(resid>0)

[ch2324]

thanks Mr startz, another question please, how get the number of positive obs in the scalar? an error message "Scalar sent to function which operates on a matrix." and how can calculate the number of runs in the resid?

Code: Select all

scalar nobsp
nobop=@sum(resid>0)

[startz]

No idea. Sorry.

[EViews Gareth]

What's the definition of a "run"?

If it is simply any time resid switches from negative to positive or vice versa...

Code: Select all

series posres = resid>0
series runs = @recode(@trend=0, 1, (resid>0 and resid(-1)>0) or (resid<0 and resid(-1)>0))

scalar nobsp = @sum(posres)
scalar nobsr = @sum(runs)


[ch2324]

a tiny mistake the correct code is:

Code: Select all

series runs = @recode(@trend=0, 1, (resid>0 and resid(-1)<0) or (resid<0 and resid(-1)>0))

thanks million Mr Gareth & Mr startz for your help