Difference between revisions of "Programming"
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point for topics related to programming
== Python ==
== Python ==
Revision as of 01:11, 29 April 2021
Here are some starting point for topics related to programming. Generally we rely on external sources for basic how-tos and only provide domain-specific advice ourselves. You can also check out our Youtube channel and blog for more topics and demonstrations.
Python is a language widely used in the climate community for data analysis. It's also one of the most commonly used languages generally, knowing Python is a very useful skill.
- Software Carpentry Introduction to Python
- Software Carpentry Plotting and Programming in Python
- Python for Atmosphere and Ocean Scientists
- CLEX Conda environment at NCI
A handy way to work with Python is to use the Jupyter Notebook interface. This lets you make documents combining text, python code and images. You can run Jupyter at NCI using the CLEX Conda environment.
If you're making plots on a map check out the Cartopy library - this handles things like map projections, drawing coastlines and adding background images.
The xarray library is a great place to start if you're working with gridded NetCDF data. It allows you to easily open a file, perform common types of analyses like climatologies, and easily plot results.
Pandas is a similar library for tabular data, like you'd get from observations at a weather station.
Numpy and Scipy are the grandfathers of Python science. They provide optimised versions of standard mathematical functions, especially for working with arrays. Xarray and Pandas both use Numpy arrays to store data.
Fortran is the language most commonly used in numerical climate and weather models, like MOM and WRF. It's not commonly used outside of science, its main advantage is its optimised speed on supercomputers.
Bash is the most common language used in the Linux terminal, though there are alternatives like 'csh' and 'zsh'. There are a wide variety of command line programs available
There's a number of useful tools for working with climate data on the command line, most notably CDO (climate data operators) and NCO (netcdf operators). Both provide easy access to a wide variety of operations.