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IRIX 6.2 Development Libraries
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SGI IRIX 6.2 Development Libraries.iso
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complib.idb
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clartg.z
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clartg
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1996-03-14
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2KB
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67 lines
CCCCLLLLAAAARRRRTTTTGGGG((((3333FFFF)))) CCCCLLLLAAAARRRRTTTTGGGG((((3333FFFF))))
NNNNAAAAMMMMEEEE
CLARTG - generate a plane rotation so that [ CS SN ] [ F ] [ R ] [ __
]
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
SUBROUTINE CLARTG( F, G, CS, SN, R )
REAL CS
COMPLEX F, G, R, SN
PPPPUUUURRRRPPPPOOOOSSSSEEEE
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.
AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
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.
PPPPaaaaggggeeee 1111