Hi Michael,
Thank you for the didactic explanation. I learned new concepts that I had never heard before.
I tried it on my model and it works perfectly.
Cheers,
Ana
Search found 8 matches
- 2 years ago
- Forum: Syntax
- Topic: Concatenate in GAMS
- Replies: 2
- Views: 3678
- 2 years ago
- Forum: Syntax
- Topic: Concatenate in GAMS
- Replies: 2
- Views: 3678
Concatenate in GAMS
Hi, I am importing two different tables into GAMS: RotStandOut(SiteIndexS,SiteIndexP,SiteINdexB,Rot_Perc,Ages,Items) PixTable(Stands,Pixels,SiteIndexS,SiteIndexP,SiteIndexB,Rot_Perc,Items) Both tables have common sets (SiteIndexS,SiteIndexP,SiteINdexB,Rot_Perc). I need to group those sets together c...
- 3 years ago
- Forum: Syntax
- Topic: How to create an index in GAMS
- Replies: 1
- Views: 2474
How to create an index in GAMS
Hi, Considering that I have two parameters: Parameter1(a,b,c,"age") Parameter2(a,b,c,"SiteIndex") How can I create: Parameter3(a,b,c,"age.SiteIndex")? I mean, what I'm wondering is if there is a way of putting together both parameters creating a "unique" index...
- 3 years ago
- Forum: Syntax
- Topic: Running GAMS in phases
- Replies: 4
- Views: 6980
Re: Running GAMS in phases
Thank you all for your replies.
After reading both suggestions and consulting GAMS documentation, I think brucemccarl's suggestion would fit my needs the best. The only problem is that I have an old version of GAMS (24.1) and apparently the save and restart does not work there. Am I right?
After reading both suggestions and consulting GAMS documentation, I think brucemccarl's suggestion would fit my needs the best. The only problem is that I have an old version of GAMS (24.1) and apparently the save and restart does not work there. Am I right?
- 3 years ago
- Forum: Syntax
- Topic: Running GAMS in phases
- Replies: 4
- Views: 6980
Running GAMS in phases
Hi, I am building an economic model in GAMS, which, differently from the famous "transport" model does not call for optimization using lp or others. Usually, I just press f9 and GAMS runs it. However, I have reached a phase where I will: 1) export some tables to R (I am using an Excel file...
- 3 years ago
- Forum: Syntax
- Topic: Is it possible to calculate an integral in GAMS?
- Replies: 2
- Views: 2246
Is it possible to calculate an integral in GAMS?
Hi, I need to calculate the volume of a tree by integrating the "taper" function below. I did this code in R, and it works well, but now that I am trying to code it in GAMS I cannot find a way of doing that. How do we calculate integrals in GAMS? Any suggestions? --------------- midh <- 13...
- 4 years ago
- Forum: Syntax
- Topic: Position of an element in a table
- Replies: 2
- Views: 2014
Re: Position of an element in a table
Hi, Thanks for your reply. Well, my initial idea was to find the position of the highest NPV and use this number to search for another parameter value correspondent to the same position, but in another table. However, the code you provided gave me an insight into another way of doing so, which is mo...
- 4 years ago
- Forum: Syntax
- Topic: Position of an element in a table
- Replies: 2
- Views: 2014
Position of an element in a table
Hi, Considering the table below, how can I find out the position (1st, 2nd element...) of the highest NPV for each Stand? (for Stand 6 it would return 3rd, for Stand 7 it would return 2nd). I tried the ord() function but it works only with one-dimensional sets, which is not the case since I am tryin...