> > > Because floating-point arithmetic as done by limited precision computers is > always an approximation. An IEEE 754 double-precision 64-bit floating point > number uses a 53-bit fraction and therefore has about 16 decimal digits of > precision. So calculating zero within 13 digits (e-013) is pretty good. > > The calculation done by the Geo::Ellipsoid module is very complex and > involves sines, cosines, tangents, etc. Precision will be lost with each > floating-point operation. > > Have you worked out what 2e-13 miles is in inches? For all practical > purposes, it IS zero. >
Thank you for the great explanation. Yes that is close enough to 0 for me :) Thanks again. -Chris -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
