R6 class for a fuzzy concept with sparse internal representation

This class implements the data structure and methods for fuzzy concepts.

Methods

Public methods

• Concept$new()

• Concept$get_extent()

• Concept$get_intent()

• Concept$print()

• Concept$to_latex()

• Concept$clone()

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Method new()

Creator for objects of class Concept

Usage

Concept$new(extent, intent)

Arguments

extent

(Set) The extent of the concept.

intent

(Set) The intent of the concept.

Returns

An object of class Concept.

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Method get_extent()

Internal Set for the extent

Usage

Concept$get_extent()

Returns

The Set representation of the extent.

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Method get_intent()

Internal Set for the intent

Usage

Concept$get_intent()

Returns

The Set representation of the intent.

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Method print()

Prints the concept to console

Usage

Concept$print()

Returns

A string with the elements of the set and their grades between brackets .

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Method to_latex()

Write the concept in LaTeX format

Usage

Concept$to_latex(print = TRUE)

Arguments

print

(logical) Print to output?

Returns

The fuzzy concept in LaTeX.

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Method clone()

The objects of this class are cloneable with this method.

Usage

Concept$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

# Build a formal context and find its concepts
fc_planets <- FormalContext$new(planets)
fc_planets$find_concepts()

# Print the first three concepts
fc_planets$concepts[1:3]
#> A set of 3 concepts:
#> 1: ({}, {small, medium, large, near, far, moon, no_moon})
#> 2: ({Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto}, {})
#> 3: ({Uranus, Neptune}, {medium, far, moon})

# Select the first concept:
C <- fc_planets$concepts$sub(1)

# Get its extent and intent
C$get_extent()
#> {}
C$get_intent()
#> {small, medium, large, near, far, moon, no_moon}