equifreq {lfl}

Return equifrequent breaks

Description

If both left and right equal to "none", the function returns a vector of n values from x that divide the range of values in x into n - 1 equidistant intervals. If the left (resp. right) argument equals to "infinity", -Inf (resp. Inf) is prepended (resp. appended) to the result. If it equals to "same", the first (resp. last) value is doubled. See fcut() for what such vectors mean.

Usage

equifreq(
  x,
  n,
  left = c("infinity", "same", "none"),
  right = c("infinity", "same", "none")
)

Arguments

x

A numeric vector of input values

n

The number of breaks of x to find (n must be at least 2)

left

The left border of the returned vector of breaks: "infinity", "same" or "none" (see the description below)

right

The right border of the returned vector of breaks: "infinity", "same" or "none" (see the description below)

Details

If the left (resp. right) argument equals to "infinity", -Inf (resp. Inf) is prepended (resp. appended) to the result. If it equals to "same", the first (resp. last) value is doubled. Such functionality is beneficial if using the result of this function with e.g. the fcut() function: Inf values at the beginning (resp. at the end) of the vector of breaks means that the fuzzy set partition starts with a fuzzy set with kernel going to negative (resp. positive) infinity; the doubled value at the beginning (resp. end) results in half-cut (trimmed) fuzzy set.

Value

A vector of equifrequent breaks

Author(s)

Michal Burda

See Also

equidist(), fcut()