clartg(3F)

NAME
     CLARTG - generate a plane rotation so that   [ CS SN ] [ F ] [ R ]  [ __
     ]

SYNOPSIS
     SUBROUTINE CLARTG( F, G, CS, SN, R )

         REAL           CS

         COMPLEX        F, G, R, SN

PURPOSE
     CLARTG generates a plane rotation so that
        [ -SN  CS  ]     [ G ]     [ 0 ]

     This is a faster version of the BLAS1 routine CROTG, except for the
     following differences:
        F and G are unchanged on return.
        If G=0, then CS=1 and SN=0.
        If F=0 and (G .ne. 0), then CS=0 and SN=1 without doing any
           floating point operations.


ARGUMENTS
     F       (input) COMPLEX
             The first component of vector to be rotated.

     G       (input) COMPLEX
             The second component of vector to be rotated.

     CS      (output) REAL
             The cosine of the rotation.

     SN      (output) COMPLEX
             The sine of the rotation.

     R       (output) COMPLEX
             The nonzero component of the rotated vector.