finverse for function handle
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Do anyone know how to manage the computation of the inverse of a function handle?
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John D'Errico
2018-3-29
If we are being asked to know how to invert ANY possible function handle, thus solve any possible problem, the answer is it is not possible.
If an inverse theoretically exists, then you MAY be able to use fsolve or fzero. That would require the use of starting values, supplied by you. And the solution would be only as good as those starting values.
If by "inverse" you mean something completely different, such as compute the multiplicative inverse of the output of a function handle, then just write it as another function.
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Birdman
2018-3-29
As far as I know, there is no ready tool for that, but you can define a process where your function handle is converted to symbolic, taken inverse in symbolic form and then convert it back to a function handle. Try this:
f=@(x) x^2+5
g=sym(f) %converted to symbolic
h=finverse(g) %inverse of the function
F=matlabFunction(h) %converted to function handle
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