Python to generate nice looking SVG graph http://pygal.org/
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===============
Documentation
===============
Interpolations
==============
.. contents::
Without interpolation:
----------------------
``interpolate``
.. pygal-code::
chart = pygal.Line()
chart.add('line', [1, 5, 17, 12, 5, 10])
With cubic interpolation:
-------------------------
``interpolate``
.. pygal-code::
chart = pygal.Line(interpolate='cubic')
chart.add('line', [1, 5, 17, 12, 5, 10])
With quadratic interpolation:
-----------------------------
``interpolate``
.. pygal-code::
chart = pygal.Line(interpolate='quadratic')
chart.add('line', [1, 5, 17, 12, 5, 10])
With lagrange interpolation:
----------------------------
``interpolate``
.. pygal-code::
chart = pygal.Line(interpolate='lagrange')
chart.add('line', [1, 5, 17, 12, 5, 10])
With trigonometric interpolation:
---------------------------------
``interpolate``
.. pygal-code::
chart = pygal.Line(interpolate='trigonometric')
chart.add('line', [1, 5, 17, 12, 5, 10])
With hermite interpolation:
---------------------------
``interpolate``
.. pygal-code::
chart = pygal.Line(interpolate='hermite')
chart.add('line', [1, 5, 17, 12, 5, 10])
For hermite you can also pass additionnal parameters to configure tangent behaviour:
.. pygal-code::
chart = pygal.Line(interpolate='hermite', interpolation_parameters={'type': 'finite_difference'})
chart.add('line', [1, 5, 17, 12, 5, 10])
.. pygal-code::
chart = pygal.Line(interpolate='hermite', interpolation_parameters={'type': 'cardinal', 'c': .75})
chart.add('line', [1, 5, 17, 12, 5, 10])
.. pygal-code::
chart = pygal.Line(interpolate='hermite', interpolation_parameters={'type': 'kochanek_bartels', 'b': -1, 'c': 1, 't': 1})
chart.add('line', [1, 5, 17, 12, 5, 10])
For more information see the `wikipedia article <http://en.wikipedia.org/wiki/Cubic_Hermite_spline#Finite_difference>`_
Interpolation precision
-----------------------
``interpolation_precision``
You can change the resolution of the interpolation with the help of `interpolation_precision`:
.. pygal-code::
chart = pygal.Line(interpolate='quadratic')
chart.add('line', [1, 5, 17, 12, 5, 10])
.. pygal-code::
chart = pygal.Line(interpolate='quadratic', interpolation_precision=3)
chart.add('line', [1, 5, 17, 12, 5, 10])
Next: `Sparklines </sparks>`_