Error while applying fminunc : fun must be a function

Hi, I have just started learning and using matlab functions. I wanted to minimize simple quadratic function as follows:

fun = x.^2
x0 = 10
[x, fval] = fminunc(fun, x0)

I was expecting o/p as x=0 fval=0 but instead it gave me: fun should be a function or string or inline....

It is such a simple script. Where am I going wrong?

Thanx in advance :)

Answer 1

[Walter Roberson]

fun = @(x) x.^2