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Two doctest fixes #4366

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44 changes: 21 additions & 23 deletions package/MDAnalysis/analysis/atomicdistances.py
Original file line number Diff line number Diff line change
Expand Up @@ -67,53 +67,51 @@

We will calculate the distances between an atom group of atoms 101-105
and an atom group of atoms 4001-4005 with periodic boundary conditions.
To select these atoms:
To select these atoms: ::

>>> u = mda.Universe(GRO, XTC)
>>> ag1 = u.atoms[100:105]
>>> ag2 = u.atoms[4000:4005]

We can run the calculations using any variable of choice such as
``my_dists`` and access our results using ``my_dists.results``:
``my_dists`` and access our results using ``my_dists.results``: ::

>>> my_dists = ad.AtomicDistances(ag1, ag2).run()
>>> my_dists.results
array([[37.80813681, 33.2594864 , 34.93676414, 34.51183299, 34.96340209],
[27.11746625, 31.19878079, 31.69439435, 32.63446126, 33.10451345],
[23.27210749, 30.38714688, 32.48269361, 31.91444505, 31.84583838],
[18.40607922, 39.21993135, 39.33468192, 41.0133789 , 39.46885946],
[26.26006981, 37.9966713 , 39.14991106, 38.13423586, 38.95451427],
[26.83845081, 34.66255735, 35.59335027, 34.8926705 , 34.27175056],
[37.51994763, 38.12161091, 37.56481743, 36.8488121 , 35.75278065],
[37.27275501, 37.7831456 , 35.74359073, 34.54893794, 34.76495816],
[38.76272761, 41.31816555, 38.81588421, 39.82491432, 38.890219 ],
[39.20012515, 40.00563374, 40.83857688, 38.77886735, 41.45775864]])
[27.11746625, 31.19878079, 31.69439435, 32.63446126, 33.10451345],
[23.27210749, 30.38714688, 32.48269361, 31.91444505, 31.84583838],
[18.40607922, 39.21993135, 39.33468192, 41.0133789 , 39.46885946],
[26.26006981, 37.9966713 , 39.14991106, 38.13423586, 38.95451427],
[26.83845081, 34.66255735, 35.59335027, 34.8926705 , 34.27175056],
[37.51994763, 38.12161091, 37.56481743, 36.8488121 , 35.75278065],
[37.27275501, 37.7831456 , 35.74359073, 34.54893794, 34.76495816],
[38.76272761, 41.31816555, 38.81588421, 39.82491432, 38.890219 ],
[39.20012515, 40.00563374, 40.83857688, 38.77886735, 41.45775864]])

To do the computation without periodic boundary conditions, we can enter
the keyword argument ``pbc=False`` after ``ag2``. The result is different
in this case:
in this case: ::

>>> my_dists_nopbc = ad.AtomicDistances(ag1, ag2, pbc=False).run()
>>> my_dists_nopbc.results
array([[37.80813681, 33.2594864 , 34.93676414, 34.51183299, 34.96340209],
[27.11746625, 31.19878079, 31.69439435, 32.63446126, 33.10451345],
[23.27210749, 30.38714688, 32.482695 , 31.91444505, 31.84583838],
[18.40607922, 39.21992825, 39.33468192, 41.0133757 , 39.46885946],
[26.26006981, 37.99666906, 39.14990985, 38.13423708, 38.95451311],
[26.83845081, 34.66255625, 35.59335027, 34.8926705 , 34.27174827],
[51.86981409, 48.10347964, 48.39570072, 49.14423513, 50.44804292],
[37.27275501, 37.7831456 , 35.74359073, 34.54893794, 34.76495816],
[56.39657447, 41.31816555, 38.81588421, 39.82491432, 38.890219 ],
[39.20012515, 40.00563374, 40.83857688, 38.77886735, 41.45775864]])
[27.11746625, 31.19878079, 31.69439435, 32.63446126, 33.10451345],
[23.27210749, 30.38714688, 32.482695 , 31.91444505, 31.84583838],
[18.40607922, 39.21992825, 39.33468192, 41.0133757 , 39.46885946],
[26.26006981, 37.99666906, 39.14990985, 38.13423708, 38.95451311],
[26.83845081, 34.66255625, 35.59335027, 34.8926705 , 34.27174827],
[51.86981409, 48.10347964, 48.39570072, 49.14423513, 50.44804292],
[37.27275501, 37.7831456 , 35.74359073, 34.54893794, 34.76495816],
[56.39657447, 41.31816555, 38.81588421, 39.82491432, 38.890219 ],
[39.20012515, 40.00563374, 40.83857688, 38.77886735, 41.45775864]])

"""

import numpy as np

from MDAnalysis.lib.distances import calc_bonds


import warnings
import logging
from .base import AnalysisBase

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2 changes: 1 addition & 1 deletion package/doc/sphinx/source/documentation_pages/overview.rst
Original file line number Diff line number Diff line change
Expand Up @@ -120,7 +120,7 @@ over time::
< DCDReader '/..../MDAnalysis/tests/data/adk_dims.dcd' with 98 frames of 3341 atoms (0 fixed) >

Finally, the :meth:`MDAnalysis.Universe.select_atoms` method generates a new
:class:`~MDAnalysis.core.groups.AtomGroup` according to a selection criterion
:class:`~MDAnalysis.core.groups.AtomGroup` according to a selection criterion::

>>> calphas = u.select_atoms("name CA")
>>> print(calphas)
Expand Down
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