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C Copyright (c) 2003-2010 University of Florida
C
C This program is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C The GNU General Public License is included in this distribution
C in the file COPYRIGHT.
DOUBLE PRECISION FUNCTION ANGLE(A,B,N)
IMPLICIT DOUBLE PRECISION (A-H,O-Z)
DIMENSION A(N),B(N)
DTOR=DACOS(-1.D0)/180.D0
Z = ddot(N,A,1,B,1)
C
C MAKE SURE A VALUE OF SLIGHTLY MORE THAN ONE DOES NOT GET PASSED
C TO DACOS
C
ANGLE=DACOSX(Z,1.D-10)/DTOR
RETURN
END
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