logger.argument {RnBeads} | R Documentation

## logger.argument

### Description

Reads a command-line argument supplied to a script.

### Usage

    logger.argument(arg.names, full.name, arg.type = "character",
      accepted.values = NULL, default = NULL, arg.list = commandArgs())

### Arguments

`arg.names` | `character` vector of acceptable argument names. This function scans the provided arguments and performs a case insensitive match.
`full.name` | One-element `character` vector giving the argument's full name or description. This is used in a log message in case of an error.
`arg.type` | Variable type of the argument. Must be one of `"character"`, `"logical"`, `"integer"`, `"double"`, `"numeric"` or `"real"`. The last three types are all synonyms.
`accepted.values` | Vector of accepted values for the argument. This must be of the type given in `arg.type`. Set this to `NULL` if there are no restrictions on the argument values.
`default` | Default value for the argument in case it is not specified. Setting this to `NULL` makes the argument required, that is, an error is generated if the argument is not specified. Set this to `NA` if is not a required argument and it shouldn't default to a specific value. Otherwise, if `accepted.values` is provided, this must be one of its elements.
`arg.list` | Vector of arguments provided at the execution of the script. The arguments should be provided as name=value pairs.

### Details

This is convenience function for reading parameters supplied to the script in the form name = value. It expects that logging is enabled (see `rnb.options`). The function fails if this condition is not met.

### Value

Argument's value, or `NULL` if such is not provided.

### Author(s)

Yassen Assenov

### Examples

    n.iterations <- logger.argument("iterations", "number of iterations", "integer",
      accepted.values = 1:100, default = 1L)
    logger.close()

[Package RnBeads version 2.0.1 Index]