Hi Quentin. Try to search CORDIC calculation methods - it is possible
to calculate alot of functions with required precisions without table
look up and for suitable number of iterations.

WBR Dmitry.

Quentin wrote:
> You will see that while X is linear, Y is not (Log??). With these
> information available, how would I calculate Y for all the other
> values of X? I want to use it in a lookup table in the PIC.
> Thanks
> Quentin