wxgen is a command-line tool for generating arbitrarily long weather time-series. The generator
produces gridded output for multiple variables (e.g. temperature, precipitation) and aims to
have realistic covariances in space, time, and across variables.
The generator uses a database of past weather model simulations (e.g 15 day forecasts) and combines the segments stochastically. Longer trajectories are created by concatenating the shorter trajectories from the database. This is done by matching the end state of one trajectory with the beginning state of another. The matching is done using a specified metric, such as the sum of the square differences between states (with some kind of normalization strategy as each atmospheric variable has different variances).
For information about how to use wxgen, check out the wiki page at https://github.com/metno/wxgen/wiki
Prerequisites
Install the required pacakges:
sudo apt-get update
sudo apt-get install netcdf-bin libnetcdf-dev libhdf5-serial-dev
sudo apt-get install python-setuptools python-pip
sudo apt-get install python-numpy python-scipy python-matplotlib python-mpltoolkits.basemapInstalling using pip
After this, the easiest is to install the latest version of wxgen using pip:
sudo pip install wxgenThis will create the executable /usr/local/bin/wxgen. If /usr/local/bin is not in your PATH
environment variable, then add it (i.e add export PATH=/usr/local/bin/:$PATH to ~/.bashrc).
If you do not have sudo privileges do:
pip install wxgen --userThis will create the executable ~/.local/bin/wxgen. Add this to your PATH environment
variable if necessary (i.e add export PATH=$PATH:~/.local/bin to ~/.bashrc).
If at a later time you wish to update to a newer release, do:
pip install wxgen --upgrade(adding --user if appropriate)
Installing from source
Alternatively, to install from source, download the source code of the latest version: https://github.com/metno/wxgen/releases/. Unzip the file and navigate into the extracted folder.
Then install wxgen by executing the following inside the extracted folder:
sudo pip install -r requirements.txt
sudo python setup.py installIf you are working on the code, the -e flag ensures that you do not need to rerun pip install every time you make changes to the code:
sudo pip install -e .Again, if you do not have sudo privileges, remove sudo and append --user to the previous pip
and python commands.
Copyright (C) 2017 MET Norway. Wxgen is licensed under LGPL version 3 or (at your option) any later version.
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