Gams-Mode

• July 3, 2015

  Automatic operator formatting mode in Emacs

  Emacs has a nice new mode called electric-operator developed by David Spepherd. It helps when you write code by formatting all operators in a predefined way. For example, in R it adds spaces around the operator signs, when you write 1+1, this is automatically converted into 1 + 1.

  You can define your own way of formatting for other modes. For gams-mode you add the following to your .emacs file

  Lisp

  (require 'electric-operator) (apply #'electric-operator-add-rules-for-mode 'gams-mode electric-operator-prog-mode-rules) (electric-operator-add-rules-for-mode 'gams-mode (cons "=E=" " =E= ") (cons "=G=" " =G= ") (cons "*" #'gams-mode-*) (cons "**" " ** ")) (add-hook 'gams-mode-hook #'electric-operator-mode)

  … Read the rest “Automatic operator formatting mode in Emacs”

• February 11, 2015

  Column guide in Emacs

  Many professional editors have a column guide. For example, below you see in the Powershell editor a veritcal line at column 80.

  

  This marker comes in handy, if you want to print your files. In Emacs I usually check for the column 80 in the status line.

  

  However, I usually forget to check, and when I print out stuff or publish, I got line breaks where I don’t want them. Passing the 80th column for comments is not a problem, as a simple Ctrl-q forces Emacs to break the lines nicely and add comment symbols at the beginning.

  

  But after … Read the rest “Column guide in Emacs”

• February 22, 2014

  Using org-mode in outline-mode

  I have written about using org-mode in gams-mode in an earlier post. Gams-mode lets you structure your gams file using headings and subheadings. These headings can be (partially) collapsed. The structure of your file could look like this:

  

  You can now cycle through the structure using Shift-Tab. Tab opens a section:

  

  This is a great help in complex files.

  Gams-mode has another great outline feature for the listing file. Instead of putting a normal comment with a “*” in front, one writes a display statement that starts with a “@” (see the code above). We now see a nice heading … Read the rest “Using org-mode in outline-mode”

• October 9, 2012

  Outlining in Gams-Mode: Org-Mode for Gams

  The new version of Gams-mode has a new feature that I like very much. It allows you to use an outline-mode in your gams files. It is called org-mode, which is a major mode in Emacs.

   

  You can outline your Gams file using sections, subsections, etc. You define sections using the following notation:

   

         *@

   

  or for subsections

   

         *@@, *@@@, etc.

   

  Let us have a look at the file org-minor-mode.gms. This file can be found in your gams-mode directory. This file contains all the help for gams-mode. All the help

  … Read the rest “Outlining in Gams-Mode: Org-Mode for Gams”

• April 6, 2012

  Auto-Completion in Emacs, LaTeX and Gams

  The fun with Emacs is that you can discover new (or old) stuff that makes your life much easier on an almost weekly base. I was reading the manual on Emacs Speaks Statistics and discovered that there is a mode called auto-completion. I googled it, installed it and after some experimenting, I got it running. You can find it here. It comes with autocompletion for some programming languages (Python, Ruby, C+, etc.) but not for LaTeX, so I googled further and discovered an extension called auto-complete-latex (you can download it here.

  Here are some screenshots: You just start

  … Read the rest “Auto-Completion in Emacs, LaTeX and Gams”