The main Web site for FreeMat is hosted on SourceForge. For example, if you want to find the volume of a cube of side length 3, you could so. Note the following behavior differences between MATLABs regexp and FreeMats : • If you have an old version of pcre installed, then named. There are several forms for function declarations in FreeMat. The most general An example of using helper functions is included in the examples. Another.

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FreeMat, Octave, MatLab, and SciLab Free Tutorials

Additional functions that appear after the first function are known as helper functions or local functions.

That means that variables defined or modified inside a function do not frreemat the scope of the caller. Inside the function, varargin is a cell-array that contains all arguments passed to the function that have not already been accounted for. We can change that by passing the first argument by reference: In these cases, the last argument to the parameter list is the special argument varargin.

Similarly, the function can create a cell array named feeemat for variable length output lists.


To assist in deciphering the exact parameters that were passed, FreeMat also defines two variables inside the function context: That means that a function can freely define and use variables without unintentionally using a variable name reserved elsewhere. The function name fname can be any legal FreeMat identifier. A first attempt at doing so has no effect: Note that this is only true for the first function that appears in a. See help for nargin and nargout for more freemxt.

The flip side of this fact is that functions are harder to debug than scripts without using the keyboard function, because the intermediate calculations used in the function are not available once the function exits. Another important feature of functions, as opposed to, say scriptsis that they have their own scope. Also, FreeMat works like C in that the caller does not have to supply the full list of arguments. In some circumstances, it is necessary to have functions that take a variable number of arguments, or that return a variable number of results.

FreeMat, Octave, MatLab, and SciLab Free Tutorials

Sunday, October 25, See help varargin and varargout for more details. As variable argument and return functions are covered elsewhere, as are keywords, we include one final example that demonstrates the use of helper functions, or local functions, where multiple function declarations occur in the same file. Functions are stored in files with the. The most general syntax for a function declaration is the following: Page Last Updated on: For functions with a fixed number of input or output parameters, the syntax is sxamples simpler: Furthermore the names of these helper functions are determined by their declaration and not by the name of the.


Also, when keywords see help keywords are used, an arbitrary subset ffreemat the parameters may be unspecified. However, the second call succeeds, and note that arg1 has now changed. An example of using helper functions is included in the examples. Examples Here is an example of a trivial function that adds its first argument to twice its second argument: These are functions that can eaxmples be called by other functions in the same.

Note that the name of the file and not the function name fname used in the declaration is how the function appears in FreeMat. So, for example, if the file frefmat named foo.