slargv(3S)

NAME
     SLARGV - generate a vector of real plane rotations, determined by
     elements of the real vectors x and y

SYNOPSIS
     SUBROUTINE SLARGV( N, X, INCX, Y, INCY, C, INCC )

         INTEGER        INCC, INCX, INCY, N

         REAL           C( * ), X( * ), Y( * )

IMPLEMENTATION
     These routines are part of the SCSL Scientific Library and can be loaded
     using either the -lscs or the -lscs_mp option.  The -lscs_mp option
     directs the linker to use the multi-processor version of the library.

     When linking to SCSL with -lscs or -lscs_mp, the default integer size is
     4 bytes (32 bits). Another version of SCSL is available in which integers
     are 8 bytes (64 bits).  This version allows the user access to larger
     memory sizes and helps when porting legacy Cray codes.  It can be loaded
     by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
     only one of the two versions; 4-byte integer and 8-byte integer library
     calls cannot be mixed.

PURPOSE
     SLARGV generates a vector of real plane rotations, determined by elements
     of the real vectors x and y. For i = 1,2,...,n
        (  c(i)  s(i) ) ( x(i) ) = ( a(i) )
        ( -s(i)  c(i) ) ( y(i) ) = (   0  )


ARGUMENTS
     N       (input) INTEGER
             The number of plane rotations to be generated.

     X       (input/output) REAL array,
             dimension (1+(N-1)*INCX) On entry, the vector x.  On exit, x(i)
             is overwritten by a(i), for i = 1,...,n.

     INCX    (input) INTEGER
             The increment between elements of X. INCX > 0.

     Y       (input/output) REAL array,
             dimension (1+(N-1)*INCY) On entry, the vector y.  On exit, the
             sines of the plane rotations.

     INCY    (input) INTEGER
             The increment between elements of Y. INCY > 0.

     C       (output) REAL array, dimension (1+(N-1)*INCC)
             The cosines of the plane rotations.
     INCC    (input) INTEGER
             The increment between elements of C. INCC > 0.

SEE ALSO
     INTRO_LAPACK(3S), INTRO_SCSL(3S)

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