Getting started¶

scikit-fuzzy is an fuzzy logic Python package that works with numpy arrays. The package is imported as skfuzzy:

>>> import skfuzzy

though the recommended import statement uses an alias:

>>> import skfuzzy as fuzz

Most functions of skfuzzy are brought into the base package namespace. You can introspect the functions available in fuzz when using IPython by:

[1] import skfuzzy as fuzz
[2] fuzz.

and pressing the Tab key.

Finding your way around¶

A list of submodules and functions is found on the API reference webpage.

Within scikit-fuzzy, universe variables and fuzzy membership functions are represented by numpy arrays. Generation of membership functions is as simple as:

>>> import numpy as np
>>> import skfuzzy as fuzz
>>> x = np.arange(11)
>>> mfx = fuzz.trimf(x, [0, 5, 10])
>>> x
array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10])
>>> mfx
array([ 0. ,  0.2,  0.4,  0.6,  0.8,  1. ,  0.8,  0.6,  0.4,  0.2,  0. ])

While most functions are available in the base namespace, the package is factored with a logical grouping of functions in submodules. If the base namespace appears overwhelming, we recommend exploring them individually. These include

fuzz.membership

Fuzzy membership function generation

fuzz.defuzzify

Defuzzification algorithms to return crisp results from fuzzy sets

fuzz.fuzzymath

The core of scikit-fuzzy, containing the majority of the most common fuzzy logic operations.

fuzz.intervals

Interval mathematics. The restricted Dong, Shah, & Wong (DSW) methods for fuzzy set math live here.

fuzz.image

Limited fuzzy logic image processing operations.

fuzz.cluster

Fuzzy c-means clustering.

fuzz.filters

Fuzzy Inference Ruled by Else-action (FIRE) filters in 1D and 2D.