R: Validate a Justification

valid.just {grid} | R Documentation

## Validate a Justification

### Description

Utility functions for determining whether a justification specification is valid and for resolving a single justification value from a combination of character and numeric values.

### Usage

    valid.just(just)
    resolveHJust(just, hjust)
    resolveVJust(just, vjust)

### Arguments

`just` | A justification either as a character value, e.g., `"left"`, or as a numeric value, e.g., 0.
`hjust` | A numeric horizontal justification
`vjust` | A numeric vertical justification

### Details

These functions may be useful within a `validDetails` method when writing a new grob class.

### Value

A numeric representation of the justification (e.g., `"left"` becomes 0, `"right"` becomes 1, etc, ...). An error is given if the justification is not valid.

### Author(s)

Paul Murrell

[Package grid version 3.5.1 Index]