Solve Function for Given Range of Inputs

syms x
x = sym('x')
x = -4:4
eqn = exp(-x.^2) == f(x)
S = solve(eqn,x)

I keep getting an error message when trying to folve the function f(x) for values of x -4 through 4. How would i define f(x) to get rid of the error message?

[AndresVar]

here is an example to restrict the solution for x

Equations and systems solver - MATLAB solve (mathworks.com)

What is f(x) in your case?

[Torsten]

How would i define f(x) to get rid of the error message?

Depends on which equation you are trying to solve.

What you write at the moment does not make sense since you already fix x as x=-4:4.

So exp(-x.^2)==f(x) is either true or false depending on f, but you can't solve for x.

Answer 1

[Walter Roberson]

syms x real
f(x) = sin(x)

f(x) = 

eqn = exp(-x.^2) == f(x)

eqn = 

Sn = vpasolve(eqn, x, [-4 4])

Sn =