EViews doesnt remove quotes when the equation is a str_list

[loulouviews]

Hi,

I want to do something like

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wfcreate m 1990 2000 series myTS=nrnd %_myts="myTS" %_eq="{%_myts} {%_myts}(-1)" equation myEq.ls {%_eq} c

But EViews does not remove quotes and I got the following error : { is not defined in "EQUATION MYEQ.LS {"MYTS"} {"MYTS"}(-1) C".

Does anybody have any clues ?

Thanks

Louis

[EViews Gareth]

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%_eq=%_myts + " " + %_myts +"(-1)"

[loulouviews]

Thanks for your prompt reply, I'm always confused with the rules of quotes replacing in EViews.

I still have a question : EViews is going to replace %_myTS by its current value, at assignment
So if I do

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%_eq=%_myTS+" "+%_myTS+"(-1)" series myTS2=nrnd+1 %_myTS="myTS2"

Then %_eq would still be with myTS and not with myTS2 right ?

I was looking a way to make EViews replacing %_myTS by its current value when the equation is estimated (because I'm declaring a bunch of equations before a for loop on variables names in which each equation is estimated, but the endogenous variable can changed depending on a condition which is evaluated inside the for loop)
with something like :

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equation eq{%_myTS}= {%_eq} c

[EViews Gareth]

The answer to your first question is yes. I don't understand the second.

[loulouviews]

I was looking for a way to declare an equation with the name of variables that I would declare later on.
That is why I was looking for a way to declare an equation as a string list and then estimate the equation with each variable_as_a_string replace by its current value.
Imagine that you have something like :

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%_eq1=%_myTS+"(-1)" %_eq2=%_myTS+"(-1)"+%_myTS+"(-2)" series myTS2=nrnd+1 series myTS1=nrnd for !i=1 to 2 if condition then %_myTS="myTS1" else %_myTS="myTS2" endif equation eq{!i}.ls {_myTS} c {%_eq{!i}} next

It would not work.

But if EViews was replacing quotes inside an equation as in my first post, ie :

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%_eq1="{%_myts}(-1)" %_eq2="{%_myts}(-1) {%_myts}(-2)"

The loop above would work

[EViews Gareth]

I'm still not 100% certain I know what your end goal is. I think you're going about it all the wrong way, but cannot be sure.

In the example you give, I don't see why you don't just do:

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%_eq1=%_myTS+"(-1)" %_eq2=%_myTS+"(-1)"+%_myTS+"(-2)" series myTS2=nrnd+1 series myTS1=nrnd for !i=1 to 2 if condition then %_myTS="myTS1" else %_myTS="myTS2" endif equation eq{!i}.ls {%_myTS} c {%_myTS}(-1 to -!i) next

[loulouviews]

The purpose of my example was to illustrate the challenge I face.
My actual challenge is a bunch of very similar equations on oil prices (almost only the endogenous variable is varying). I want to do numerous comparable things for each of these equations (estimating, forecasting, doing some econometric analysis, etc.) so I'm doing a for loop on these oil prices variables. These procedure is inside a subroutine which has a boolean argument affecting the endogenous variable (basically taking account or not of some external impacts) -> that why I was willing to have an "if condition" inside my for loop and declare equations before the loop without knowing yet the endogenous variable.
I realize this is not so clear, sorry about it.
I'm going to looking for a different way to achieve that.
Thanks again for your prompt replies.

[EViews Gareth]

What you're describing sounds trivial.

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create u 100 for !i=1 to 10 series y{!i}=nrnd next series x=nrnd for !i=1 to 10 !cond = @nrnd>0 if !cond=1 then %dep = "y" + @str(!i) + "(-1)" else %dep = "y" + @str(!i) + "(-2)" endif equation eq{!i}.ls {%dep} c x(-1 to -!i) next

[loulouviews]

The equation could not be defined inside the for loop because the endogenous variable is not the only parameter changing (that's why I wrote "almost").

[EViews Gareth]

Why does that matter? Change any variable/parameter you want inside the loop.