R tutorials
(These are a bit dated now, but still relevant)
R is statistical/computing environment that is extremely flexible, extensible and open-sourced. I recommend its use very highly.
Most of the source code that I provide are written in the R-language. Feel free to use and modify them. But if there are any errors, please let me know.
There are many tutorials online. I have made a few simple tutorials for key concepts useful especially in a stock assessment context:
Using R. Part 3. Advanced Usage
Using R. Part 4. Even more specialized topics
The following links will likely be of interest to you as well: