OpenAppend

Usage

• OpenAppend["file"] opens a file to append output to it, and returns an OutputStream object.

Notes

• The following options can be given:

BinaryFormat	False	whether to use binary format for the file
CharacterEncoding	Automatic	what raw character encoding to use
FormatType	InputForm	default format for printing expressions
NumberMarks	$NumberMarks	when to use ` marks in approximate numbers
PageWidth	78	number of character widths per line
TotalWidth	Infinity	maximum number of character widths for a single expression

• On computer systems that support pipes, OpenAppend["!command"] runs the external program specified by command, and opens a pipe to send input to it.

• If OpenRead does not succeed in opening a particular file or pipe, it generates a message, and returns $Failed.

• OpenAppend resolves file names according to the procedure described in Section A.6.1.

• OpenAppend returns OutputStream["name", n], where name is the full name of a file or command, and n is a serial number that is unique across all streams opened in the current Mathematica session.

• SetOptions can be used to change the properties of an output stream, after it is already open.

• Functions like Put and Write automatically open the files or pipes they need, if they are not already open.

• With the default setting BinaryFormat -> False, the setting for CharacterEncoding is taken to be "ASCII".

• See Section 2.12.3.

• See also: Close, Put, Streams, LinkCreate.

• New in Version 1.