.. _python-plotting-old:

Old Python Plotting
===================

.. note::
    The python plotting API has been changed as of v4.0. Examples using the
    new python plotting API can be found here :ref:`python-plotting`. Some
    backwards compatability was maintained, so the following example should
    still work.

The following example can be used to create a Temperature-Entropy plot for
propane (R290):

.. plot::
    :include-source:

    from CoolProp.Plots.Plots import Ts

    Ts('R290', show=True)

The following example can be used to create a Pressure-Enthalpy plot for R410A:

.. plot::
    :include-source:

    from CoolProp.Plots.Plots import Ph

    Ph('R410A', show=True)

The available plots are:

==== ====================
PT   Pressure-Temperature
Prho Pressure-Density
Ph   Pressure-Enthalpy
Ps   Pressure-Entropy
Trho Temperature-Density
Ts   Temperatre-Entropy
hs   Enthalpy-Entropy
==== ====================

The following example will overlay a simple four-component cycle on a R410A
Pressure-Enthalpy plot.

.. plot::
    :include-source:

    from matplotlib import pyplot
    from CoolProp.Plots.Plots import Ph
    from CoolProp.Plots.SimpleCycles import SimpleCycle

    Ph('R410A')
    SimpleCycle('R410A', 250, 300, 5, 5, 0.7)
    pyplot.show()

A more advanced example using built-in functions to draw lines of constant
properties is given below. Note the different ways to invoke drawIsoLines:

.. plot::
    :include-source:

    from matplotlib import pyplot
    from CoolProp.Plots.Plots import Ts, drawIsoLines

    Ref = 'n-Pentane'
    ax = Ts(Ref)
    ax.set_xlim([-0.5, 1.5])
    ax.set_ylim([300, 530])
    quality = drawIsoLines(Ref, 'Ts', 'Q', [0.3, 0.5, 0.7, 0.8], axis=ax)
    isobars = drawIsoLines(Ref, 'Ts', 'P', [100, 2000], num=5, axis=ax)
    isochores = drawIsoLines(Ref, 'Ts', 'D', [2, 600], num=7, axis=ax)
    #isenthalps = drawIsoLines(Ref, 'Ts', 'H', [100, 300], num=5, axis=ax)
    pyplot.show()