FreeMat: STR2FUNC String to Function conversion

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STR2FUNC String to Function conversion

Section: Functions and Scripts

# Usage

The `str2func` function converts a function name into a function pointer. The syntax is

        y = str2func('funcname')

where `funcname` is the name of the function. The return variable `y` is a function handle that points to the given function.

An alternate syntax is used to construct an anonymous function given an expression. They syntax is

        y = str2func('anonymous def')

where `anonymous def` is an expression that defines an anonymous function, for example `'@(x) x.^2'`.

# Example

Here is a simple example of using `str2func`.

    --> sin(.5)              % Calling the function directly

    ans =
        0.4794

    --> y = str2func('sin')  % Convert it into a function handle

    y =
     @sin
    --> y(.5)                % Calling 'sin' via the function handle

    ans =
        0.4794

Here we use `str2func` to define an anonymous function

    --> y = str2func('@(x) x.^2')

    y =
     @(x)   x.^2
    --> y(2)

    ans =
     4