Two ways of detecting complex numbers have been suggested:
iscomplex =. 0 ~: 11&o. isnotreal =. ~:~ + They are not equivalent. iscomplex a 1 isnotreal a 0 What is an example for the finite number a? Henry Rich On 11/29/2014 10:20 PM, Linda Alvord wrote:
\Very nice. Or, if it has a different conjugate it must be complex. Linda -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lippu Esa Sent: Saturday, November 29, 2014 4:37 PM To: '[email protected]' Subject: Re: [Jprogramming] Better way to locate coomplex or real numbers in an array A real number equals its conjugate, so (~:+) works too: ]A=:(i:2)j./i:2 _2j_2 _2j_1 _2 _2j1 _2j2 _1j_2 _1j_1 _1 _1j1 _1j2 0j_2 0j_1 0 0j1 0j2 1j_2 1j_1 1 1j1 1j2 2j_2 2j_1 2 2j1 2j2 (~:+) A 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 Esa -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Henry Rich Sent: 29. marraskuuta 2014 05:34 To: [email protected] Subject: Re: [Jprogramming] Better way to locate coomplex or real numbers in an array ]A=:(i:2)j./i:2 _2j_2 _2j_1 _2 _2j1 _2j2 _1j_2 _1j_1 _1 _1j1 _1j2 0j_2 0j_1 0 0j1 0j2 1j_2 1j_1 1 1j1 1j2 2j_2 2j_1 2 2j1 2j2 (0 ~: 11&o.) A 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 Henry Rich On 11/28/2014 10:27 PM, Linda Alvord wrote:A is an array of real and complex numbers. Is there an easier way to locate all the complex numbers. Signum locates each numbers intersection with a line from it to the origin and the circle. ]A=:(i:2)j./i:2 _2j_2 _2j_1 _2 _2j1 _2j2 _1j_2 _1j_1 _1 _1j1 _1j2 0j_2 0j_1 0 0j1 0j2 1j_2 1j_1 1 1j1 1j2 2j_2 2j_1 2 2j1 2j2 *A _0.707107j_0.707107 _0.894427j_0.447214 _1 _0.894427j0.447214 _0.707107j0.707107 _0.447214j_0.894427 _0.707107j_0.707107 _1 _0.707107j0.707107 _0.447214j0.894427 0j_1 0j_1 0 0j1 0j1 0.447214j_0.894427 0.707107j_0.707107 1 0.707107j0.707107 0.447214j0.894427 0.707107j_0.707107 0.894427j_0.447214 1 0.894427j0.447214 0.707107j0.707107 -.(*A)e. _1 0 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1 I am looking for the best way to locate all the complex numbers. Linda ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
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