How can I get input of function when the output is constant?

Hi,

How can I get input of function when the output is constant?

In this function, output = f(input)

output is constant and input should be controlled to match the output.

Thank you.

Answer 1

[Matt J]

fzero(@(x)y-f(x), xInitial)

[kkh1897]

how can I apply fzero function when x is vector with more than two values?

[Walter Roberson]

When it is a vector, do you want to return a scalar output or do you want to return one copy of the constant for each input?

F = @(x) constant * ones(size(x))