how to convert handle to array

hello, it's my first post and i'm not very good in english, so soryy for my errors. I've got one problem with matlab. I've got a handle like a=@(x)( f1(x), f2(x),..,fn(x)) and i have to read one of function in handle to have something like this @(x)(f2(x)). is there any function to convert handle argument to structure where the functions will be in separate cells like [f1(x), f2,..fn]?

Answer 1

[Walter Roberson]

No, the closest is

indexat = @(expr, index) expr(index);
F2 = @(x) indexat(a(x), 2);

Answer 2

[Star Strider]

There is no one function, but it is easy enough. Since it is not obvious from your question what the individual functions return, you are correct in assigning them to Cell Arrays.

Note the use of ‘curly brackets’ { } to define the cell arrays in the assignment to a and the cell references in y1 and y2.

Example:

f1 = @(x) x^2;
f2 = @(x) 1:x;

a = @(x) [{f1(x)}  {f2(x)}];

y = a(5)
y1 = y{1}
y2 = y{2}

produces:

y = 

      [25]    [1x5 double]

y1 =

      25

y2 =

       1     2     3     4     5

[Blazej]

we not understand. i've got n-argument handle and i have to send one of the argument to another function like a=@(x)(x(1)^2, x(2)^2, 2* x(1)) and i dont need value, but one of function to have @(x)(x(2)^2)

[Star Strider]

If all your functions are producing scalar outputs for a particular input, that is even easier. Use square brackets [ ] to create a vector (or matrix):

a=@(x) [x(1)^2, x(2)^2, 2* x(1)];

x = [3 5];
y = a(x)

produces:

y =

       9    25     6

[Blazej]

if i do it i get vector of values of funcion in handle, but i have to have all functions separately. I have process your's code and i have good answer ;) a = @(x) [{@(x) x(1)^2} {@(x) x(2)^3}];

y = a(1) y1 = y{1} y2 = y{2} but i don't know what y = a(1) do, but it works..

[Star Strider]

The

y = a(1)

assignment passes the value 1 to the anonymous function a and creates a cell array of function evaluations. The next two lines (assignments to y1 and y2) access individual elements of the cell array.

I am happy it does what you want it to!