clean=: (* |@*)&.+. Eugene McDonnell objected when we made *x to be 0 for x near 0, saying that *x should be 0 only if x is 0.
On Sun, May 26, 2013 at 9:32 PM, km <[email protected]> wrote: > Let's say a real number "ought to be zero" if its absolute value is <: the > comparison tolerance 2^_44 . Write a verb "clean" that replaces real > numbers that ought to be zero with zero. How would you clean a complex > number? > > 1 o. 1r2p1 * i. 5 > 0 1 1.22465e_16 _1 _2.44929e_16 > clean 1 o. 1r2p1 * i. 5 > 0 1 0 _1 0 > > ^ 0j1 * 1r2p1 * i. 5 > 1 6.12323e_17j1 _1j1.22465e_16 _1.83697e_16j_1 1j_2.44929e_16 > clean ^ 0j1 * 1r2p1 * i. 5 > 1 0j1 _1 0j_1 1 > > --Kip Murray > > Sent from my iPad > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
