mapclassify.NaturalBreaks

class mapclassify.NaturalBreaks(y, k=5, initial=10)

Natural Breaks Map Classification.

Parameters:

ynumpy.array

\((n,1)\), values to classify.

kint (default 5)

The number of classes required.

initialint (default 10)

The number of initial solutions generated with different centroids. The best of initial results are returned.

Attributes:

ybnumpy.array

\((n,1)\), bin IDs for observations.

binsnumpy.array

\((k,1)\), the upper bounds of each class.

kint

The number of classes.

countsnumpy.array

\((k,1)\), the number of observations falling in each class.

Examples

>>> import mapclassify
>>> import numpy
>>> numpy.random.seed(123456)
>>> cal = mapclassify.load_example()
>>> nb = mapclassify.NaturalBreaks(cal, k=5)
>>> nb.k
5

>>> nb.counts.tolist()
[49, 3, 4, 1, 1]

>>> nb.bins
array([  75.29,  192.05,  370.5 ,  722.85, 4111.45])

__init__(y, k=5, initial=10)

Methods

__init__(y[, k, initial])
find_bin(x)	Sort input or inputs according to the current bin estimate.
get_adcm()	Absolute deviation around class median (ADCM).
get_fmt()
get_gadf()	Goodness of absolute deviation of fit.
get_legend_classes([fmt])	Format the strings for the classes on the legend.
get_tss()	Returns sum of squares over all class means.
make(*args, **kwargs)	Configure and create a classifier that will consume data and produce classifications, given the configuration options specified by this function.
plot(gdf[, border_color, border_width, ...])	Plot a mapclassifier object.
plot_histogram([color, linecolor, ...])	Plot histogram of y with bin values superimposed
set_fmt(fmt)
table()
update([y, inplace])	Add data or change classification parameters.

Attributes

fmt

update(y=None, inplace=False, **kwargs)

Add data or change classification parameters.

Parameters:

ynumpy.array (default None)

\((n,1)\), array of data to classify.

inplacebool (default False)

Whether to conduct the update in place or to return a copy estimated from the additional specifications.

**kwargsdict

Additional parameters that are passed to the __init__ function of the class. For documentation, check the class constructor.