mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
62 lines
2.0 KiB
Plaintext
62 lines
2.0 KiB
Plaintext
NAME
|
|
polar - specify a complex number by modulus (radius) and argument (angle)
|
|
|
|
SYNOPSIS
|
|
polar(r, t [, eps])
|
|
|
|
TYPES
|
|
r real
|
|
t real
|
|
eps nonzero real, defaults to epsilon()
|
|
|
|
return number (real or complex)
|
|
|
|
DESCRIPTION
|
|
Returns the real or complex number with real and imaginary parts
|
|
multiples of epps nearest or next to nearest to r * cos(t) and
|
|
r * sin(t) respectively. The error for each part will be less
|
|
than 0.75 * abs(eps), but usually less than 0.5 * abs(eps).
|
|
|
|
EXAMPLE
|
|
> print polar(2, 0), polar(1, 2, 1e-5), polar(1, 2, 1e-10)
|
|
2 -.41615+.9093i -.4161468365+.9092974268i
|
|
|
|
> pi = pi(1e-10); eps = 1e-5
|
|
> print polar(2, pi/4, eps), polar(2, pi/2, eps), polar(2, 3*pi/4, eps)
|
|
1.41421+1.41421i 2i -1.414215+1.41421i
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LINK LIBRARY
|
|
COMPLEX * cpolar(NUMBER *r, NUMBER *t, NUMBER *eps);
|
|
|
|
SEE ALSO
|
|
abs, arg, re, im
|
|
|
|
## Copyright (C) 1999 Landon Curt Noll
|
|
##
|
|
## Calc is open software; you can redistribute it and/or modify it under
|
|
## the terms of the version 2.1 of the GNU Lesser General Public License
|
|
## as published by the Free Software Foundation.
|
|
##
|
|
## Calc is distributed in the hope that it will be useful, but WITHOUT
|
|
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
|
|
## Public License for more details.
|
|
##
|
|
## A copy of version 2.1 of the GNU Lesser General Public License is
|
|
## distributed with calc under the filename COPYING-LGPL. You should have
|
|
## received a copy with calc; if not, write to Free Software Foundation, Inc.
|
|
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
##
|
|
## @(#) $Revision: 29.1 $
|
|
## @(#) $Id: polar,v 29.1 1999/12/14 09:16:02 chongo Exp $
|
|
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/polar,v $
|
|
##
|
|
## Under source code control: 1995/10/25 04:03:46
|
|
## File existed as early as: 1995
|
|
##
|
|
## chongo <was here> /\oo/\ http://reality.sgi.com/chongo/
|
|
## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
|