|GNU Octave Manual Version 3|
by John W. Eaton, David Bateman, Søren Hauberg
Paperback (6"x9"), 568 pages
RRP £24.95 ($39.95)
Commands are a special class of functions that only accept string input arguments. A command can be called as an ordinary function, but it can also be called without the parentheses like the following example shows
my_command hello world
which is the same as
The general form of a command call is
name arg1 arg2 ...
which translates directly to
name ("arg1", "arg2", ...)
A function can be used as a command if it accepts string input arguments.
To do this, the function must be marked as a command, which can be done
mark_as_command command like this
name is the function to be marked as a command.
One difficulty of commands occurs when one of the string input arguments are stored in a variable. Since Octave can't tell the difference between a variable name, and an ordinary string, it is not possible to pass a variable as input to a command. In such a situation a command must be called as a function.
- Built-in Function: mark_as_command (name)
- Enter name into the list of commands.
See also unmark_command, iscommand
- Built-in Function: unmark_command (name)
- Remove name from the list of commands.
See also mark_as_command, iscommand
- Built-in Function: iscommand (name)
- Return true if name is a command style function. If name
is omitted, return a list of identifiers which are marked as commands with
See also mark_as_command, unmark_command
- Built-in Function: mark_as_rawcommand (name)
- Enter name into the list of raw input commands and to the list of
command style functions.
Raw input commands are like normal command style functions, but they
receive their input unprocessed (i.e. strings still contain the quotes
and escapes they had when input). However, comments and continuations
are handled as usual, you cannot pass a token starting with a comment
character ('#' or '%') to your function, and the last token cannot be
a continuation token ('\' or '...').
See also unmark_rawcommand, israwcommand, iscommand, mark_as_command
- Built-in Function: unmark_rawcommand (name)
- Remove name from the list of raw input commands.
Note that this does not remove name from the list of command style
See also mark_as_rawcommand, israwcommand, iscommand, unmark_command
- Built-in Function: israwcommand (name)
- Return true if name is a raw input command function.
If name is omitted, return a list of identifiers which are marked as
raw input commands with mark_as_rawcommand.
See also mark_as_rawcommand, unmark_rawcommand
|ISBN 095461206X||GNU Octave Manual Version 3||See the print edition|