semvec/pypi-packages huggingface dataset:
pvextractor 0.4
Position-velocity diagram extractor.
License: BSD 3-Clause
Requires Python: >=3.8

Position-Velocity Diagram Extractor
===================================

Full docs are available
`here <http://pvextractor.readthedocs.org/en/latest/>`__

Tool to slice through data cubes and extract position-velocity (or
other) slices.

There are a few `utilities <pvextractor/utils>`__ related to header
trimming & parsing. Otherwise, there’s one main function,
`pvextractor <pvextractor/pvextractor.py>`__, that takes a data cube and
a series of points and returns a PV array. It is based on scipy’s
``map_coordinates`` but also has .

For an example use case, see [this notebook]
(http://nbviewer.ipython.org/urls/raw.github.com/radio-astro-tools/pvextractor/master/examples/IRAS05358Slicing.ipynb)
(for a permanent, compiled version, look
`here <examples/IRAS05358Slicing.html>`__)

.. figure:: http://img.shields.io/badge/powered%20by-AstroPy-orange.svg?style=flat
   :alt: Powered by Astropy Badge

   Powered by Astropy Badge

Minimal Install Instructions
----------------------------

::

   pip install https://github.com/ericmandel/pyds9/archive/master.zip
   pip install https://github.com/radio-astro-tools/spectral-cube/archive/master.zip
   pip install https://github.com/radio-astro-tools/pvextractor/archive/master.zip

The pvextractor GUI
-------------------

Run it like this:

::

   from pvextractor.gui import PVSlicer
   pv = PVSlicer('L1448_13CO.fits')
   pv.show()

Click to select “control points” along the path, then press “enter” to
expand the width of the slice, then click. Optionally, “y” will show the
exact regions extracted.

Using pvextractor in ds9
------------------------

There is a python script that will be installed along with pvextractor.
You can invoke it from the command line, but the preferred approach is
to load the tool into ds9. First, determine the path to
``ds9_pvextract.ans``; it is in
`scripts/ds9_pvextract.ans <scripts/ds9_pvextract.ans>`__. Then start up
ds9 with the analysis tool loaded

::

   ds9 -analysis load /path/to/pvextractor/scripts/ds9_pvextract.ans  &

Then load any cube in ds9, draw a line, and press ‘x’ or press “PV
Extractor” in the menu.

.. figure:: images/pvextractor_ds9_example.png
   :alt: Example DS9 use

   Example DS9 use

Build and coverage status
=========================

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   :target: https://travis-ci.org/radio-astro-tools/pvextractor
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   :target: https://coveralls.io/r/radio-astro-tools/pvextractor?branch=master
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