Solve Function for Given Range of Inputs
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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?
2 个评论
AndresVar
2022-2-27
here is an example to restrict the solution for x
What is f(x) in your case?
Torsten
2022-2-27
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.
回答（1 个）
syms x real
f(x) = sin(x)
eqn = exp(-x.^2) == f(x)
Sn = vpasolve(eqn, x, [-4 4])
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