Solve Function for Given Range of Inputs

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Braeden Elbers
Braeden Elbers 2022-2-26
回答： Walter Roberson 2022-2-27

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
Torsten
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.

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回答（1 个）

Walter Roberson
Walter Roberson 2022-2-27
Ran in:
syms x real
f(x) = sin(x)
f(x) = 
eqn = exp(-x.^2) == f(x)
eqn = 
Sn = vpasolve(eqn, x, [-4 4])
Sn = 

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