s.function for inverse signal

I have signal Ax+B its out from block simulink I want to inverse this signl with S-function what I will do? thinks

Answer 1

[Walter Roberson]

When you say "inverse", do you mean you want to multiply it by negative 1, or you want to subtract each point from the logical maximum (so minimums become maxima and the other way around); or do you mean that you want to create the inverse function so that if y = f(x) then f_inverse(y) would be x ?

If you mean the inverse function (exchange of axes), then is your function strictly increasing or strictly decreasing? If it is not then there will be some y = f(x1) = f(x2) and then you would not know whether f_inverse(y) should return x1 or x2 .