The code shown here passes the sqr anonymous function to the MATLAB quad function to compute its integral from zero to one:Īs another example, you could create the following anonymous function that uses two input arguments, x and y. To execute the sqr function defined above, typeīecause sqr is a function handle, you can pass it in an argument list to other functions. As with any function handle, you execute the function associated with it by specifying the variable that contains the handle, followed by a comma-separated argument list in parentheses. The operator constructs a function handle for this function, and assigns the handle to the output variable sqr. When you call this function, MATLAB assigns the value you pass in to variable x, and then uses x in the equation x.^2: The statement below creates an anonymous function that finds the square of a number. You can use this function handle in the same way as any other MATLAB function handle. The syntax statement shown above constructs the anonymous function, returns a handle to this function, and stores the value of the handle in variable fhandle. Suppose you want to minimize the objective given in the function myfun, which is parameterized by its second argument c.
The constructor uses a different syntax: fhandle = (e.g., fhandle = To find out more about function handles, see Function Handles. FUN can also be an anonymous function: x fminunc((x) 5x(1)2 + x(2)2,5 1) If FUN is parameterized, you can use anonymous functions to capture the problem-dependent parameters. You can create a function handle to any MATLAB function. The sign is a required part of an anonymous function definition.įunction handles not only provide access to anonymous functions. In Matlab however they seem to do the same and inline seems scheduled for decomissioning so it should not be used: Only use the anonymous functions. Create an anonymous function called myfun1 to evaluate f (x) sin (x)/x. This is essential for problems that include solving a nonlinear equation, integrating or differentiating a function, minimizing a function or a solving differential equation.
It is also useful when you want to pass your anonymous function in a call to some other function. MATLAB's anonymous functions provide an easy way to specify a function. Creating a function handle for an anonymous function gives you a means of invoking the function. The sign is the MATLAB operator that constructs a function handle. Leading off the entire right side of this statement is an sign. These two components are similar to the body and argument list components of any function. Next is arglist, which is a comma-separated list of input arguments to be passed to the function. This consists of any single, valid MATLAB expression. Starting from the right of this syntax statement, the term expr represents the body of the function: the code that performs the main task your function is to accomplish. The syntax for creating an anonymous function from an expression is You can construct an anonymous function either at the MATLAB command line or in any M-file function or script. Anonymous Functions :: Types of Functions (Programming) ProgrammingĪnonymous functions give you a quick means of creating simple functions without having to create M-files each time.