spatstat (version 1.51-0)

begins: Check Start of Character String

Description

Checks whether a character string begins with a particular prefix.

Usage

begins(x, firstbit)

Arguments

x

Character string, or vector of character strings, to be tested.

firstbit

A single character string.

Value

Logical vector of the same length as x.

Details

This simple wrapper function checks whether (each entry in) x begins with the string firstbit, and returns a logical value or logical vector with one entry for each entry of x. This function is useful mainly for reducing complexity in model formulae.

Examples

Run this code
# NOT RUN {
  begins(c("Hello", "Goodbye"), "Hell")
  begins("anything", "")
# }

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