Ventana software support forum

Thank u so much, Tom!

I hope it works well with me.
But whatever it is, thank u so much for spending your precious time to help me

I'm still not sure what the goal is. Can you restate? So far it sounds like: - each unit generates a random amount - the sum of generation across all the units = demand I could imagine other constraints, for example that some units are bigger than others. It's okay if the some units having bigger v...

It sounds like you want total generation to be a fixed number, allocated among all the sources with some random noise in the individual sizes or shares. Normalization is a common way to do this: prelim unit size[x] = 500 + RANDOM UNIFORM(-100,100,0) prelim total size = SUM(prelim unit size[x!]) nor...

It would help if you upload the model (it will save us guessing about what you are doing). How do you split total generation into the four types? And then how is the total coal generation split between the 14 coal elements? We do have some allocation functions, but it would be easier if you upload ...

Hi there, I think i couldn't use that solution. Here is the bigger picture of what i'm doing. Screen Shot 2021-02-01 at 00.30.24.png This is what i have in Total Generation Screen Shot 2021-02-01 at 00.32.09.png So, the idea is to have that Total Generation, let say at Year 0 = 38,657, i want to dis...

That looks like what i'm looking for.
Thanks so much, Admin. I'll try to do it, and hope it works well with my model.

Thanks once again

Hello there, It has been a while i've been here. Hope all is good, especially in this pandemic. Anyway, i wolud like to ask regarding on this one issue that i got upon completing my model. I have a variable that i have assigned to a subscript. This subscript contains 10 elements. Let me put it this ...

Thanks a lot, Tom & Admin.

Tried the solutions suggested, and i get to do what exactly i want to do.

But now i encountered another problem which is, an error put as "Arguments out of range in VECTOR SORT_ORDER".
What does that means?

It might have been much easier to do this with subscripts, all the structures look identical so subscripts would have been perfect. If you upload the model, it should be easy to demonstrate how to do this. But i've learnt that we can only have up to 8 subscripts. Please enlight me on this, Admin. H...

Hello all!

I'm back with another confusion in my life with Vensim
How do i combine all outputs into one matrix/under one variable? But i do not want it to be accummulated.

Please send me some help. Thanks in advance.

Hello everyone,

I have one simple yet confusing (at least for me) question regarding on Vensim's function.

What is the different between NPV, NPVE, and Net Present Value?

Omg, i'm so sorry. This wasn't supposed to be posted here.
Sorry Admin and thanks anyway for your respond.

Hello and top of the day, everyone

I have this confusion with my output in one of the submodel i have here.

tomfid wrote: ↑Mon Oct 12, 2020 3:32 pm If the requirement is a table that interleaves marginal cost and generation, as in your example, I don't think there's a way to do that within Vensim.

Oh really? It's okay then.Thanks a lot Tom & Admin

Anyone can please help me? :'(

Administrator wrote: ↑Fri Oct 09, 2020 3:57 pm Maybe vector elm map function is what you need?

You can use vector elm map to pick elements out from another subscripted parameter.

I tried using VECTOR ELM MAP as suggested, but it seems it didn't work (or maybe i used it wrong?)

Administrator wrote: ↑Fri Oct 09, 2020 3:56 pm Can you upload the model? I'm sure it's possible, but we don't have enough information to help.

Here it is

It's on the MARGINAL COST's view.

Hello there! :D I have this one question regarding on the model that i'm currently working with. I have 2 variables; sorted marginal cost and sorted generation as show in figure below. Screen Shot 2020-10-09 at 23.36.57.png These two variables are mapped under the same subscript and both are actuall...

Administrator wrote: ↑Fri Oct 02, 2020 7:01 am I see now what you want (I think).

You would need to combine the subscript ranges into a single one. See the attached model.

Oh my goodness!
Thank you so so much! Finally i got the answer on how to do that.

I owe you big time, Admin!<3

Hello there, I have this problem. I tried to combine these two variables, marginal cost coal and marginal cost gas. Presentation4.png I want the output for "combine marginal cost" to be like this; Presentation3.png I tried using the; combine marginal cost = IF THEN ELSE( marginal cost gas[...

I'm still hoping that i can get some enlighten bout my problem

Do you get a syntax error when you try to switch? If yes, what is it? Or can you upload the model or show us where the error is? Yes....i do get a syntax error. I'm afraid i can share this model because it's not mine. But the syntax error written is "missing a closin paranthesis on a lookup ta...

Hello mates,

I have one question.
How can i change the layout of my model from text to sketch view?

Tried to do it through the VIEW tab, but still couldn't get it into sketch view.

Ok ... I think I understand what the cost curve is doing. But why go to all the trouble of constructing the curve, when you can simply observe the marginal cost at time 9.17 directly? How can i do that, Tom? I mean, i am totally lost at the moment. I tried IF THEN ELSE but idk, it didn't turn out a...

I hope i can get some enlightment to solve my problem