Thanks. I know smart minds have already worked on this. Wish me luck. On Wed, Sep 4, 2019 at 3:16 PM Henry Rich <[email protected]> wrote:
> I will put it back your way for the next beta, as > > 3 : '(-(y -~ !)%0.001&* (0.001%~[:-/[:! 0.001 0 +/ ]) > ])^:_<.&170^:(-:+)^.y' > > Like all Newton's Method solutions, it goes bad if the derivative is too > small. If you can make it more robust let me know. > > Henry Rich > > On 9/4/2019 1:21 PM, Don Guinn wrote: > > factinv=:3 : 0 > > d=: 1 : '0.001%~[:-/[:u 0.001 0+]' > > (-(!-y"_)%0.001&*!"0 d])^:_<.&170^:(-:+)^.y > > ) > > > --- > This email has been checked for viruses by AVG. > https://www.avg.com > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
