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.IX Title "TRIG 3pm"
.TH TRIG 3pm 2024-04-25 "perl v5.38.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH NAME
PDL::GSLSF::TRIG \- PDL interface to GSL Special Functions
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This is an interface to the Special Function package present in the GNU Scientific Library.
.SH FUNCTIONS
.IX Header "FUNCTIONS"
.SS gsl_sf_sin
.IX Subsection "gsl_sf_sin"
.Vb 1
\&  Signature: (double x(); double [o]y(); double [o]e())
.Ve
.PP
Sin(x) with GSL semantics.
.PP
gsl_sf_sin does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_cos
.IX Subsection "gsl_sf_cos"
.Vb 1
\&  Signature: (double x(); double [o]y(); double [o]e())
.Ve
.PP
Cos(x) with GSL semantics.
.PP
gsl_sf_cos does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_hypot
.IX Subsection "gsl_sf_hypot"
.Vb 1
\&  Signature: (double x(); double xx(); double [o]y(); double [o]e())
.Ve
.PP
Hypot(x,xx) with GSL semantics.
.PP
gsl_sf_hypot does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_complex_sin
.IX Subsection "gsl_sf_complex_sin"
.Vb 1
\&  Signature: (double zr(); double zi(); double [o]x(); double [o]y(); double [o]xe(); double [o]ye())
.Ve
.PP
Sin(z) for complex z
.PP
gsl_sf_complex_sin does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_complex_cos
.IX Subsection "gsl_sf_complex_cos"
.Vb 1
\&  Signature: (double zr(); double zi(); double [o]x(); double [o]y(); double [o]xe(); double [o]ye())
.Ve
.PP
Cos(z) for complex z
.PP
gsl_sf_complex_cos does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_complex_logsin
.IX Subsection "gsl_sf_complex_logsin"
.Vb 1
\&  Signature: (double zr(); double zi(); double [o]x(); double [o]y(); double [o]xe(); double [o]ye())
.Ve
.PP
Log(Sin(z)) for complex z
.PP
gsl_sf_complex_logsin does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_lnsinh
.IX Subsection "gsl_sf_lnsinh"
.Vb 1
\&  Signature: (double x(); double [o]y(); double [o]e())
.Ve
.PP
Log(Sinh(x)) with GSL semantics.
.PP
gsl_sf_lnsinh does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_lncosh
.IX Subsection "gsl_sf_lncosh"
.Vb 1
\&  Signature: (double x(); double [o]y(); double [o]e())
.Ve
.PP
Log(Cos(x)) with GSL semantics.
.PP
gsl_sf_lncosh does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_polar_to_rect
.IX Subsection "gsl_sf_polar_to_rect"
.Vb 1
\&  Signature: (double r(); double t(); double [o]x(); double [o]y(); double [o]xe(); double [o]ye())
.Ve
.PP
Convert polar to rectlinear coordinates.
.PP
gsl_sf_polar_to_rect does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_rect_to_polar
.IX Subsection "gsl_sf_rect_to_polar"
.Vb 1
\&  Signature: (double x(); double y(); double [o]r(); double [o]t(); double [o]re(); double [o]te())
.Ve
.PP
Convert rectlinear to polar coordinates. return argument in range [\-pi, pi].
.PP
gsl_sf_rect_to_polar does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_angle_restrict_symm
.IX Subsection "gsl_sf_angle_restrict_symm"
.Vb 1
\&  Signature: (double [o]y())
.Ve
.PP
Force an angle to lie in the range (\-pi,pi].
.PP
gsl_sf_angle_restrict_symm does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_angle_restrict_pos
.IX Subsection "gsl_sf_angle_restrict_pos"
.Vb 1
\&  Signature: (double [o]y())
.Ve
.PP
Force an angle to lie in the range [0,2 pi).
.PP
gsl_sf_angle_restrict_pos does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_sin_err
.IX Subsection "gsl_sf_sin_err"
.Vb 1
\&  Signature: (double x(); double dx(); double [o]y(); double [o]e())
.Ve
.PP
Sin(x) for quantity with an associated error.
.PP
gsl_sf_sin_err does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SS gsl_sf_cos_err
.IX Subsection "gsl_sf_cos_err"
.Vb 1
\&  Signature: (double x(); double dx(); double [o]y(); double [o]e())
.Ve
.PP
Cos(x) for quantity with an associated error.
.PP
gsl_sf_cos_err does not process bad values.
It will set the bad-value flag of all output ndarrays if the flag is set for any of the input ndarrays.
.SH AUTHOR
.IX Header "AUTHOR"
This file copyright (C) 1999 Christian Pellegrin <chri@infis.univ.trieste.it>
All rights reserved. There
is no warranty. You are allowed to redistribute this software /
documentation under certain conditions. For details, see the file
COPYING in the PDL distribution. If this file is separated from the
PDL distribution, the copyright notice should be included in the file.
.PP
The GSL SF modules were written by G. Jungman.