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NAME
arg - argument (the angle or phase) of a complex number
SYNOPSIS
arg(x [,eps])
TYPES
x number
eps nonzero real, defaults to epsilon()
return real
DESCRIPTION
Returns the argument of x to the nearest or next to nearest multiple of
eps; the error will be less in absolute value than 0.75 * abs(eps),
but usually less than 0.5 * abs(eps).
EXAMPLE
; print arg(2), arg(2+3i, 1e-5), arg(2+3i, 1e-10), arg(2+3i, 1e-20)
0 0.98279 0.9827937232 0.98279372324732906799
; pi = pi(1e-10); deg = pi/180; eps = deg/10000
; print arg(2+3i, eps)/deg, arg(-1 +1i, eps)/deg, arg(-1 - 1i,eps)/deg
56.3099 135 -135
LIMITS
eps != 0
LINK LIBRARY
none
SEE ALSO
conj, im, polar, re
## Copyright (C) 1999,2021 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.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## Under source code control: 1994/09/25 20:22:31
## File existed as early as: 1994
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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