Function Handles

Often want to pass a function as an argument to another function.
 
Ex: fzero - finds the roots of a function (will discuss this more in a later video)
Need a way to tell fzero which function you want to find the roots of
Can't just write the name of a function - how will MATLAB know it's not a regular variable?

Solution: create a function handle

Function handle - way to pass a function to another function
Special type of variable which tells MATLAB "this is a function and should be treated like one"
Use @ symbol
Examples:
sinhandle = @sin;
Use sin, not useful, but shows how to use built-in functions.
Use aTrigFunction, shows how to use user made functions

Note: Difference between variable name for the function handle and the handle itself
Can use the name of function handle as if it were the name of a regular function

Plot using these function handles

Show addNoise function. Go down to example with addNoise. Use function handles made above
and plot results.