horizon: Create a function that computes linguistic horizons

Description Usage Arguments Details Value Author(s) See Also Examples

View source: R/horizon.R

Description

Based on given context and atomic expression, this function returns a function that computes a linguistic horizon, i.e. a triangular function representing basic limits of what humans treat as "small", "medium", "big" etc. within given context. Linguistic horizon stands as a base for creation of linguistic expressions. A linguistic expression is created by applying a hedge() on horizon. (Atomic linguistic expression is created from horizon by applying an empty (-) hedge).

Usage

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horizon(
  context,
  atomic = c("sm", "me", "bi", "lm", "um", "ze", "neg.sm", "neg.me", "neg.bi",
    "neg.lm", "neg.um")
)

Arguments

context

A context of linguistic expressions (see ctx3(), ctx5(), ctx3bilat() or ctx5bilat())

atomic

An atomic expression whose horizon we would like to obtain

Details

The values of the atomic parameter have the following meaning (in ascending order):

Based on the context type, the following atomic expressions are allowed:

This function is quite low-level. Perhaps a more convenient way to create linguistic expressions is to use the lingexpr() function.

Value

A function of single argument that must be a numeric vector

Author(s)

Michal Burda

See Also

ctx3(), ctx5(), ctx3bilat(), ctx5bilat(), hedge(), fcut(), lcut()

Examples

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    plot(horizon(ctx3(), 'sm'), from=-1, to=2)
    plot(horizon(ctx3(), 'me'), from=-1, to=2)
    plot(horizon(ctx3(), 'bi'), from=-1, to=2)

    a <- horizon(ctx3(), 'sm')
    plot(a)
    h <- hedge('ve')
    plot(h)
    verySmall <- function(x) h(a(x))
    plot(verySmall)

beerda/lfl documentation built on Oct. 17, 2020, 8:57 p.m.