Selecting on function from an array of anonymous functions

I have an array of 3 anonymous functions where the user is asked to select one of the three functions. It choses which function with a number of variables that passes it to the function bisect that will approximate the roots of the function. If I type the actual equation and the variables into the function bisect it works. If I pass it through a seperate .m file as I am doing here, it gives me the error:

Undefined operator '^' for input arguments of type 'cell'.

Error in Q2a>@(x)x^3-5*cos(x/2)

Error in bisect (line 15)

fa = f(a);

Error in Q2a (line 15)

bisect(f, x0(1), x1(1), nmax, eps, printflag)

where Q2a is the .m file with the folling code. How can I make this work?

eq_array = {@(x)x.^3-5*cos(x/2),@(x)tan(x/2)-x,@(x)43*x*log(x)-2*x.^2};
x0={0.5 1 75};
x1={4 3 125};
eps={0.5e-7 0.5e-9 0.5e-7};
prompt=('Which equation do you want to evalute? (1,2 or 3): ');
eq=input(prompt);
f=eq_array(eq);
x0=x0_array(eq);
x1=x1_array(eq);
nmax=40;
eps=0.5e-7;
prinflag=1;

bisect(f, x0, x1, nmax, eps, printflag)

Answer 1

[Steven Lord]

Indexing into a cell array using parentheses returns one or more elements of the cell array. The result is itself a cell array.

Indexing into a cell array using curly braces returns the contents inside one or more elements of the cell array.

Compare:

C = {1, 2, 3}
paren = C(2) % Still a cell array
curly = C{2} % Double array
whos C paren curly

You want to extract the contents inside the cell array and pass those contents into your function, so use curly braces not parentheses.

[Alex Maisonneuve]

Thank you, this worked like a charm!