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conda remove <packagename>

Anaconda+pip

Some packages are not available from anaconda but they can be installed via pip (in this case the "rayopt" package):

source activate ana-1.3.44
pip install --user rayopt

If you change psana versions at a later time, the package you installed previously with pip may not work anymore.  If so you can uninstall the old version with "pip uninstall rayopt" and install it again using the new version of psana.

Virtualenv

NOTE: the virtualenv method is not compatible with our anaconda-based psana, but we leave the documentation here in case it is useful at some point.

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