syntax of handle: f = @(X)find(X);

Hi everyone~

I'm learning about use handle. The usual syntax is h = @FuncName

But I also saw an example of f = @(X)find(X)

from here:

http://www.mathworks.com/help/matlab/matlab_prog/calling-a-function-using-its-handle.html

Can anyone please explain what the difference is? Can we use f = @find instead?

Thank you~

Answer 1

[Wayne King]

Yes, you can use

f = @find

instead in this case. For example:

y = zeros(10,1);
y(3:end) = 3:10;
f(y)

The way the example defines it gives you more flexibility in using find() for example

f = @(x)find(x>5)
f(y)

[Yuji Zhang]

I see. And i tested to find f = @ find(x>5) is illegal.

Thank you Wayne~

Answer 2

[Matt J]

You should eventually read about Anonymous Functions

Briefly, you could use f=@find. The advantage of anonymous functions is that they allow you to point to functions which are not pre-packaged and which have more intricate forms. They can also take snapshots of other MATLAB workspace variables and use them as fixed parameters. E.g.,

     a=1; b=2;
     f=@(X) find(b*X>=a);

     >> f([0,1,2])

    ans =

         2     3

[Yuji Zhang]

i see i see. yea i saw this example: sqr = @(x) x.^2;

oops i want to accept this answer too. it seems i can't accept two of them both.

it's an excellent answer. Thanks a lot Matt~