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---
:name: dlar2v
:md5sum: 6fb47caf55cd693b64352d0bddea77e7
:category: :subroutine
:arguments:
- n:
:type: integer
:intent: input
- x:
:type: doublereal
:intent: input/output
:dims:
- 1+(n-1)*incx
- y:
:type: doublereal
:intent: input/output
:dims:
- 1+(n-1)*incx
- z:
:type: doublereal
:intent: input/output
:dims:
- 1+(n-1)*incx
- incx:
:type: integer
:intent: input
- c:
:type: doublereal
:intent: input
:dims:
- 1+(n-1)*incc
- s:
:type: doublereal
:intent: input
:dims:
- 1+(n-1)*incc
- incc:
:type: integer
:intent: input
:substitutions: {}
:fortran_help: " SUBROUTINE DLAR2V( N, X, Y, Z, INCX, C, S, INCC )\n\n\
* Purpose\n\
* =======\n\
*\n\
* DLAR2V applies a vector of real plane rotations from both sides to\n\
* a sequence of 2-by-2 real symmetric matrices, defined by the elements\n\
* of the vectors x, y and z. For i = 1,2,...,n\n\
*\n\
* ( x(i) z(i) ) := ( c(i) s(i) ) ( x(i) z(i) ) ( c(i) -s(i) )\n\
* ( z(i) y(i) ) ( -s(i) c(i) ) ( z(i) y(i) ) ( s(i) c(i) )\n\
*\n\n\
* Arguments\n\
* =========\n\
*\n\
* N (input) INTEGER\n\
* The number of plane rotations to be applied.\n\
*\n\
* X (input/output) DOUBLE PRECISION array,\n\
* dimension (1+(N-1)*INCX)\n\
* The vector x.\n\
*\n\
* Y (input/output) DOUBLE PRECISION array,\n\
* dimension (1+(N-1)*INCX)\n\
* The vector y.\n\
*\n\
* Z (input/output) DOUBLE PRECISION array,\n\
* dimension (1+(N-1)*INCX)\n\
* The vector z.\n\
*\n\
* INCX (input) INTEGER\n\
* The increment between elements of X, Y and Z. INCX > 0.\n\
*\n\
* C (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)\n\
* The cosines of the plane rotations.\n\
*\n\
* S (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)\n\
* The sines of the plane rotations.\n\
*\n\
* INCC (input) INTEGER\n\
* The increment between elements of C and S. INCC > 0.\n\
*\n\n\
* =====================================================================\n\
*\n\
* .. Local Scalars ..\n INTEGER I, IC, IX\n DOUBLE PRECISION CI, SI, T1, T2, T3, T4, T5, T6, XI, YI, ZI\n\
* ..\n"
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