draw_critical_values#

pycafee.normalitycheck.kolmogorovsmirnov.KolmogorovSmirnov.draw_critical_values(self, ax=None, export=None, extension=None, file_name=None, dpi=None, decimal_separator=None)#

Draw a plot with the Kolmogorov Smirnov critical data [1].

Parameters

axNone or matplotlib.axes.SubplotBase: If ax is None, a figure is created with a preset design. The other parameters can be used to export the graph. If ax is a matplotlib.axes.SubplotBase, the function returns a matplotlib.axes.SubplotBase with the Kolmogorov Smirnov critical data. In this case, the other parameters do not affect the graph.
exportbool, optional: Whether the graph should be exported (True) or not (False). The default value is None, which implies False.
file_namestr, optional: The file name. Default is None which results in a file named "kolmogorov_smirnov_critical_plot".
extensionstr, optional: The file extension without a dot. Default is None which results in a ".png" file.
dpiint or float, optional: The figure pixel density. The default is None, which results in a 100 dpis picture. This parameter must be a number higher than zero.
decimal_separatorstr, optional: The decimal separator symbol used in the chart. It can be the dot (None or '.') or the comma (',').

Returns

axesmatplotlib.axes._subplots.AxesSubplot: The axis of the graph.

See also

get_critical_value: Returns the critical value.
fit: performs the Kolmogorov Smirnov Normality test.

Notes

To obtain the tabulated values of the Kolmogorov Smirnov test, use:

>>> from pycafee.normalitycheck.kolmogorovsmirnov import KolmogorovSmirnov
>>> ks_test = KolmogorovSmirnov()
>>> KS_TABLE = ks_test.KOLMOGOROV_SMIRNOV_TABLE
>>> print(KS_TABLE)

References

1: FRANK J. MASSEY, J. The Kolmogorov-Smirnov Test for Goodness of Fit. Journal of the American Statistical Association, v. 46, n. 253, p. 68–78, 1951. DOI: 10.2307/2280095.

Examples

Using the figure created inside the function

>>> from pycafee.normalitycheck.kolmogorovsmirnov import KolmogorovSmirnov
>>> ks_test = KolmogorovSmirnov()
>>> ax = ks_test.draw_critical_values(export=True)
    The 'kolmogorov_smirnov_critical_plot.png' file has been exported

Graph showing the tabulated values of the Kolmogorov Smirnov test for different alpha values

Using a previously created figure

>>> from pycafee.normalitycheck.kolmogorovsmirnov import KolmogorovSmirnov
>>> import matplotlib.pyplot as plt
>>> ks_test = KolmogorovSmirnov(language='pt-br')
>>> fig, ax = plt.subplots(figsize=(8,6))
>>> ax = ks_test.draw_critical_values(ax=ax)
>>> plt.savefig("ks_plot.png")
>>> plt.show()

get_critical_value

Lilliefors