One of the nice features of Gams-Mode for Emacs is the possibility to quickly look up the identifier part of a variable, parameter or set. This is a nice feature in big models or when you haven’t worked with the model for some time. Just put the cursor somewhere on the parameter in the code [...]
»
Read the rest
Now this might be obvious if you have a lot of time, but usually the rule is forgotten if you are stressed and want to finish what you are working on. Not writing comments will probably cost you a lot of time, if you take your model a year from now and see your code: [...]
»
Read the rest
The first golden rule for modeling is: Always display the results of your calculations and check them with your expectations about the results. Often you are working on a model doing a lot of preparing calculations (calibrating the model, preparing the data). Those calculations might be easy, for example calculating the shares for some parameter, [...]
»
Read the rest
The Gams mailing list can be very helpful. There are a lot of people who are willing to use their free time to answer your questions. My advice: subscribe to the mailing list at http://www.listserv.dfn.de/cgi-bin/wa?SUBED1=gams-l&A=1 ( and even if you don’t post to it, you can learn a lot of the questions and answers by [...]
»
Read the rest
First run your model by hitting C-c C-s (C stands for Ctrl) or use the same command from the menu. Emacs will open a new window and you see how Gams solves your model. When Gams is finished you can hit F10 (or C-c C-v) to show the listing file in a new buffer. We [...]
»
Read the rest
Let us start simple and get a model from the Gams-library. If you started emacs you are not in gams-mode (you can check this by looking at the menu bar: there is no gams-entry). If you load a gams model (with the extension “gms”), Emacs automatically turns on gams-mode and the gams entry appears in [...]
»
Read the rest
First of all download gams-mode from Shiro Takeda’s website: You will find it here: gams-mode-download. The files are zipped and should be unzipped to a directory Emacs will find. I show you my settings (as usual, you can do it in an other way). I have all my additional features in a directory that resides [...]
»
Read the rest
http://aquamacs.org/. On Windows it is a different story. Emacs is coming from the Unix world and on Windows installing asks for a little bit more knowledge of Windows basics. You can’t for example install an additional feature (like Gams-mode for Emacs) by just double-clicking on a file. You have to move the downloaded files to [...]
»
Read the rest
GAMS users probably spend most of their time editing their models. Just before project deadlines they may sit more than 8 hours a day in front of their computer hacking through their code. The choice of a good editor can therefore be crucial. After years of trying different editors I finally stuck (xxx) with the [...]
2 comments »
Read the rest
