How to flip/ mirror plot on the diagonal in terms of y(x) = y^(-1)(x) (finverse) on restricted domain.

Given the function:

x(y) = (exp(-y)*((1 - 4*y*exp(y))^(1/2) + 1))/2

usually I should be able to plot the inverse function by:

fplot(finverse(x(y)))

unfortunaly an inverse cannot be found, because it get's imaginary.

However, can I still mirror the existing plot?

An inverse on (-inf, 0] should be possible.

[KSSV]

Read about fliplr, flipud.

[Niklas Kurz]

This just flips arrays doesn't it?

well, I could describe the function with array values but how to achieve it with symbolic functions?

[jessupj]

if you know y=f(x), shouldn't you just plot ( f(y),y ) or something like that? e.g. plot( fliplr( [ x(:) f(x(:)) ] ))