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Octave manual pdf download.Octave RE290 User Manual



  Just like Python, you can give GNU Octave instructions in a prompt-like software/octave/ and save it to any directory. Octave can also be downloaded from , where additional infor- This manual documents how to install, run, and use GNU Octave.    

 

OCTAVE RE USER MANUAL Pdf Download | ManualsLib.DevDocs — Octave 7 documentation



   

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Your cart is currently empty. This project would not have been possible without the GNU software used in and used to produce Octave. How You Can Contribute to Octave There are a number of ways that you can contribute to help make Octave a better system. Perhaps the most important way to contribute is to write high- quality code for solving new problems, and to make your code freely available for others to use.

If you find Octave useful, consider providing additional funding to continue its development. Even a modest amount of additional funding could make a significant difference in the amount of time that is available for development and support. If you cannot provide funding or contribute code, you can still help make Octave better and more reliable by reporting any bugs you find and by offering suggestions for ways to improve Octave.

See Appendix D [Trouble], page , for tips on how to write useful bug reports. Distribution Octave is free software. This means that everyone is free to use it and free to redistribute it on certain conditions. Octave is not in the public domain. It is copyrighted and there are restrictions on its distribution, but the restrictions are designed to ensure that others will have the same freedom to use and redistribute Octave that you have. Ordering a copy of Octave from the Free Software Foundation helps to fund the development of more free software.

GNU Octave is a high-level language, primarily intended for numerical com- putations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical exper- iments. It may also be used as a batch-oriented language. GNU Octave is also freely redistributable software.

This document corresponds to Octave version 3. Octave displays an initial message and then a prompt indicating it is ready to accept input. You can begin typing Octave commands immediately afterward. If you get into trouble, you can usually interrupt Octave by typing Control-C usually written C-c for short.

C-c gets its name from the fact that you type it by holding down CTRL and then pressing c. To exit Octave, type quit, or exit at the Octave prompt. If you are new to Octave, I recommend that you try these examples to begin learning Octave by using it. Octave will respond with an answer, or by displaying a graph. Ending a command with a semicolon tells Octave to not print the result of a command.

To display the value of any variable, simply type the name of the variable. If the coefficient matrix is singular, Octave will print a warning message and compute a minimum norm solution. This is straightforward, and may be accomplished by entering the function body directly on the command line. For example, the following commands define the right hand side function for an interesting pair of nonlinear differential equations.

Note that while you are entering a function, Octave responds with a different prompt, to indicate that it is waiting for you to complete your input. Stepleman et al. To save a plot once it has been displayed on the screen, use the print com- mand. For example, print -deps foo. The default keybindings use Emacs- style commands.

For example, to recall the previous command, press Control-p usually written C-p for short. Doing this will normally bring back the previous line of input. C-n will bring up the next line of input, C-b will move the cursor backward on the line, C-f will move the cursor forward on the line, etc. A complete description of the command line editing capability is given in this manual in Section 2.

The same documentation that is avail- able in printed form is also available from the Octave prompt, because both forms of the documentation are created from the same input file. In order to get good help you first need to know the name of the command that you want to use.

This name of the function may not always be obvious, but a good place to start is to just type help. This will show you all the operators, reserved words, functions, built-in variables, and function files.

An alternative is to search the documentation using the lookfor function. This function is described in Section 2. Once you know the name of the function you wish to use, you can get more help on the function by simply including the name as an argument to help. Octave sends output that is too long to fit on one screen through a pager like less or more. When you invoke Info you will be put into a menu driven program that contains the entire Octave manual. Help for using Info is provided in this manual in Section 2.

You may want to skip this section and refer back to it later. Names that represent arguments or metasyntactic variables appear in this font or form: first-number. Commands that you type at the shell prompt sometimes appear in this font or form: octave --no-init-file.

Commands that you type at the Octave prompt sometimes appear in this font or form: foo --bar --baz. Specific keys on your keyboard appear in this font or form: ANY. Sometimes to help describe one expression, another expression is shown that produces identical results. This normally displays an error message on your terminal.

Error messages are shown on a line starting with error:. The first line of a description contains the name of the item followed by its arguments, if any. The category—function, variable, or whatever—is printed next to the right margin. The description follows on succeeding lines, sometimes with examples.

It is followed on the same line by a list of parameters. The names used for the parameters are also used in the body of the description.

Here is a description of an imaginary function foo: foo x, y, Function The function foo subtracts x from y, then adds the remaining arguments to the result. If y is not supplied, then the number 19 is used by default.

Parameters named object may be of any type. Parameters with other sorts of names e. In some sections, features common to parameters of several functions are described at the beginning. Functions in Octave may be defined in several different ways. The category name for functions may include another name that indicates the way that the function is defined. These additional tags include Function File The function described is defined using Octave commands stored in a text file. See Section On systems that support dynamic linking of user-supplied functions, it may be automatically linked while Octave is running, but only if it is needed.

Mapping Function The function described works element-by-element for matrix and vector arguments. Commands are functions that may be called without surrounding their arguments in parentheses.

If the directory does not exist, an error message is printed and the working directory is not changed. Although any variable can be set by the user, built-in variables typically exist specifically so that users can change them to alter the way Octave behaves built-in variables are also sometimes called user options. Ordinary variables and built-in variables are described using a format like that for functions except that there are no arguments. Once started, Octave reads commands from the terminal until you tell it to exit.

You can also specify the name of a file on the command line, and Octave will read and execute the commands from the named file and then exit when it is finished. You can further control how Octave starts by using the command-line options described in the next section, and Octave itself can remind you of the options available.

Type octave --help to display all available options and briefly de- scribe their use octave -h is a shorter equivalent. Print short help message and exit. This can be useful for running Octave via a remote shell command or inside an Emacs shell buffer.

This is equivalent to using both of the options --no-init-file and --no-site- file. Exit when done unless --persist is also specified. Octave also includes several built-in variables that contain information about the command line, including the number of arguments and all of the options.

For example, if you invoked Octave using the command octave --no-line-editing --silent argv would return a cell array of strings with the elements --no-line- editing and --silent. If you write an executable Octave script, argv will return the list of argu- ments passed to the script.

See Section 2. See also: program invocation name. If executing a script from the command line e. See also: program name. These files may contain any valid Octave commands, including function definitions. This file is provided so that changes to the default Octave environment can be made globally for all users at your site for all versions of Octave you have installed. Some care should be taken when making changes to this file, since all users of Octave at your site will be affected.

This file is provided so that changes to the default Octave environment can be made globally for all users for a particular version of Octave. Chapter 2: Getting Started A message will be displayed as each of the startup files is read if you invoke Octave with the --verbose option but without the --silent option.



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