- dataframe
how to encode data.frame objects: must be one of 'rows', 'columns' or 'values'
- matrix
how to encode matrices and higher dimensional arrays: must be one of 'rowmajor' or 'columnmajor'.
- Date
how to encode Date objects: must be one of 'ISO8601' or 'epoch'
- POSIXt
how to encode POSIXt (datetime) objects: must be one of 'string', 'ISO8601', 'epoch' or 'mongo'
- factor
how to encode factor objects: must be one of 'string' or 'integer'
- complex
how to encode complex numbers: must be one of 'string' or 'list'
- raw
how to encode raw objects: must be one of 'base64', 'hex' or 'mongo'
- null
how to encode NULL values within a list: must be one of 'null' or 'list'
- na
how to print NA values: must be one of 'null' or 'string'. Defaults are class specific
- auto_unbox
automatically unbox() all atomic vectors of length 1. It is usually safer to avoid this and instead use the unbox() function to unbox individual elements.
An exception is that objects of class AsIs (i.e. wrapped in I()) are not automatically unboxed. This is a way to mark single values as length-1 arrays.
- digits
max number of decimal digits to print for numeric values. Use I() to specify significant digits. Use NA for max precision.
- pretty
adds indentation whitespace to JSON output. Can be TRUE/FALSE or a number specifying the number of spaces to indent (default is 2). Use a negative number for tabs instead of spaces.
- force
unclass/skip objects of classes with no defined JSON mapping
- sep
The line separator. Plain text will be split into multiple strings
based on this.
- root_name
The name of the root element of the created xml
- encoding
The character encoding to use in the document. The default
encoding is ‘UTF-8’. Available encodings are specified at
http://xmlsoft.org/html/libxml-encoding.html#xmlCharEncoding.
- options
default: ‘format’. Zero or more of
- format
Format output
- no_declaration
Drop the XML declaration
- no_empty_tags
Remove empty tags
- no_xhtml
Disable XHTML1 rules
- require_xhtml
Force XHTML rules
- as_xml
Force XML output
- as_html
Force HTML output
- format_whitespace
Format with non-significant whitespace