rsdv (version 0.2.0)

custom_constraint: Constraint: arbitrary row-wise predicate

Description

With vectorized = FALSE (default) fn is invoked once per row with a one-row data frame and must return a single logical — easy to write but slow on large frames. With vectorized = TRUE fn is invoked once with the full data frame and must return a logical vector of length nrow(data); use this when your predicate is vectorisable for substantial speedups on large synthetic samples.

Usage

custom_constraint(fn, vectorized = FALSE)

Value

An rsdv_constraint object.

Arguments

fn

A predicate function. If vectorized = FALSE, signature is f(row) returning a single logical. If vectorized = TRUE, signature is f(data) returning a logical vector of length nrow(data).

vectorized

Logical. See above. Default FALSE.

Examples

custom_constraint(function(row) row$x > 0)
# Vectorised — usually much faster:
custom_constraint(function(data) data$x > 0, vectorized = TRUE)