pfun.f90 File Reference

Routine evaluating useful functions not always available in Fortran. More...

Go to the source code of this file.

Data Types
interface	pfun::ahav
interface	pfun::ahavh
interface	pfun::atanh
interface	pfun::gd
interface	pfun::gdi
interface	pfun::hav
interface	pfun::havh
interface	pfun::sech
interface	pfun::sechs
interface	pfun::sinhox
interface	pfun::sinhoxm
interface	pfun::sinox
interface	pfun::sinoxm

Modules
module	pfun
	This module is for evaluating several useful real-valued functions that are not always available in Fortran compilers.

Functions/Subroutines
real(dp) function	pfun::ahav_d (a)
	Arc-haversine function for double precision real. More...
real(sp) function	pfun::ahav_s (a)
	Arc-haversine function for single precision real. More...
real(dp) function	pfun::ahavh_d (a)
	Hyperbolic arc-haversine for double precision real. More...
real(sp) function	pfun::ahavh_s (a)
	Hyperbolic arc-haversine for single precision real. More...
real(dp) function	pfun::atanh_d (t)
	Hyperbolic arc-tangent for double precision real. More...
real(sp) function	pfun::atanh_s (t)
	Hyperbolic arc-tangent for single precision real. More...
real(dp) function	pfun::gd_d (x)
	Gudermannian function (related to Mercator map projections) More...
real(sp) function	pfun::gd_s (x)
	Gudermannian function (related to Mercator map projections) More...
real(dp) function	pfun::gdi_d (y)
	Inverse Gudermannian function for double precision real. More...
real(sp) function	pfun::gdi_s (y)
	Inverse Gudermannian function for single precision real. More...
real(dp) function	pfun::hav_d (t)
	Haversine function for double precision real (for geometry on the sphere). More...
real(sp) function	pfun::hav_s (t)
	Haversine function for single precision real (for geometry on the sphere). More...
real(dp) function	pfun::havh_d (t)
	Hyperbolic-haversine for double precision real (for pseudosphere geometry). More...
real(sp) function	pfun::havh_s (t)
	Hyperbolic-haversine for single precision real (for pseudosphere geometry). More...
real(dp) function	pfun::sech_d (x)
	Hyperbolic secant for double precision real. More...
real(sp) function	pfun::sech_s (x)
	Hyperbolic secant for single precision real. More...
real(dp) function	pfun::sechs_d (x)
	Hyperbolic secant-squared function (logistic distribution). More...
real(sp) function	pfun::sechs_s (x)
	Hyperbolic secant-squared function (logistic distribution). More...
real(dp) function	pfun::sinhox_d (x)
	Evaluate the symmetric real function sinh(x)/x. More...
real(dp) function	pfun::sinhoxm_d (x)
	Evaluate the symmetric real function sinh(x)/x-1. More...
real(dp) function	pfun::sinox_d (x)
	Evaluate the symmetric real function sin(x)/x. More...
real(dp) function	pfun::sinoxm_d (x)
	Evaluate the symmetric real function sin(x)/x-1, still accurate near x=0. More...

Detailed Description

Routine evaluating useful functions not always available in Fortran.

Author

R. J. Purser

Definition in file pfun.f90.