addinit(v=a)

For technical support, tips and tricks, suggestions, or any other information regarding the EViews model object.

Moderators: EViews Gareth, EViews Moderator

tvonbrasch
Posts: 539
Joined: Fri Apr 15, 2011 5:35 am

addinit(v=a)

Postby tvonbrasch » Fri Feb 02, 2024 7:57 am

If you first solve a model, then use addinit(v=a), and then solve the model again, why can the solver then terminate?

addinit_terminated.png
addinit_terminated.png (13.95 KiB) Viewed 464 times


I thought that the residuals would be set to the values they had in the first simulation when using the addinit(v=a) command. What could cause the solver to terminate when the addinit-command is used in this way?

Thomas

random_user
Posts: 17
Joined: Wed Jun 23, 2021 1:48 pm

Re: addinit(v=a)

Postby random_user » Mon Feb 05, 2024 9:33 am

It seems that this is specific to the model you're using. Because I tried it on my end, and the model I was using solved successfully both times. Strange!

tvonbrasch
Posts: 539
Joined: Fri Apr 15, 2011 5:35 am

Re: addinit(v=a)

Postby tvonbrasch » Sat Feb 10, 2024 8:54 am

Hi,

Thanks for looking into this, random_user! I still don't understand the cause, but I think it is related to the actexist-option being activated.
Thomas

EViews Matt
EViews Developer
Posts: 557
Joined: Thu Apr 25, 2013 7:48 pm

Re: addinit(v=a)

Postby EViews Matt » Mon Feb 12, 2024 6:17 pm

Hello,

It's possible that if solution values (or expressions they appear in) are very close to numeric singularities, then the adjustment of add factors combined with the solution rounding and significant digits setting could produce such failures. Here's a small program that demonstrates this effect:

Code: Select all

create u 10
series x = 3e-8
series x_a = 3e-8
model m
m.append x = x(-1)
m.append y = @log(3.3e-7 - x)
m.addassign x
m.solve
m.addinit(v=a) @all
m.scenario "Scenario 1"
m.solve

tvonbrasch
Posts: 539
Joined: Fri Apr 15, 2011 5:35 am

Re: addinit(v=a)

Postby tvonbrasch » Sat Feb 17, 2024 3:20 am

Thanks, Matt, for looking into this!


Return to “Models”

Who is online

Users browsing this forum: No registered users and 2 guests