inverse polynomial ?

[Frédéric MAILLET]

Hello,
I need to do the following:
I have a polynomial function y=P(x) that I know by the factors a0, a1,
.... a5 and I need to revert it.
Not enterily, in fact I just need to compute for some value 'y', the
corresponding value 'x'.
I know there's some good iterative algorithms to do this that I surely
can implement, but I have a performance constraint and I must have this
done as fast as possible. Is there any way with the CVI libraries I
missed or any other performant library (free) I can use ?
Thanks for any help,
--
Fred

[DanielMcchane]

I don't see any of our functions in any of our libraries that would execute this. I also looked through the instrument drivers, and I can't see anything that will solve the "other way" like you were requesting. I'm not aware of any other drivers or libraries externally available for this task. It's possible that someone will view this, and have something. I also will look around, and if I find anything, I will post back.

[Frédéric MAILLET]

Thanks for searching anyway.
This confirm my first guess that I have to implement one of those "root
solver" algorithms described in books.


DMcC a ecrit :

> I don't see any of our functions in any of our libraries that would
> execute this. I also looked through the instrument drivers, and I
> can't see anything that will solve the "other way" like you were
> requesting. I'm not aware of any other drivers or libraries
> externally available for this task. It's possible that someone will
> view this, and have something. I also will look around, and if I find
> anything, I will post back.