Mercurial > octave-nkf
view libcruft/amos/zshch.f @ 5210:996a08a3eb06 ss-2-9-0
[project @ 2005-03-15 20:46:03 by jwe]
author | jwe |
---|---|
date | Tue, 15 Mar 2005 20:46:03 +0000 |
parents | 8b0cb8f79fdc |
children |
line wrap: on
line source
SUBROUTINE ZSHCH(ZR, ZI, CSHR, CSHI, CCHR, CCHI) C***BEGIN PROLOGUE ZSHCH C***REFER TO ZBESK,ZBESH C C ZSHCH COMPUTES THE COMPLEX HYPERBOLIC FUNCTIONS CSH=SINH(X+I*Y) C AND CCH=COSH(X+I*Y), WHERE I**2=-1. C C***ROUTINES CALLED (NONE) C***END PROLOGUE ZSHCH C DOUBLE PRECISION CCHI, CCHR, CH, CN, CSHI, CSHR, SH, SN, ZI, ZR, * DCOSH, DSINH SH = DSINH(ZR) CH = DCOSH(ZR) SN = DSIN(ZI) CN = DCOS(ZI) CSHR = SH*CN CSHI = CH*SN CCHR = CH*CN CCHI = SH*SN RETURN END