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From: babak yazdanpanah on 13 Jul 2010 12:41
Hi
I would appreciate that someone help me to find a command or code to invert a polynominal function.
thanks
From: John D'Errico on 13 Jul 2010 13:14
"babak yazdanpanah" <babak.yazdanpanah(a)gmail.com> wrote in message <i1i4v5$gbi$1(a)fred.mathworks.com>...
> Hi
> I would appreciate that someone help me to find a command or code to invert a polynominal function.
> thanks

roots.m is not adequate for you?

Perhaps you want a functional inverse? Of course, you
must then recognize this is impossible for polynomials
of degree higher than 4 in general.

Or perhaps, you have a polynomial in more than 1
dimension? Again, this can be converted into a 1-d
problem for low order polynomials. But if the total
degree is higher than 4, you are again stuck.

John
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