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Generated automatically by Doxygen for LAPACK from the source code. Version 3.12.0 Thu Aug 7 2025 17:26:25 scal(3)

Detailed Description

Function Documentation

subroutinecscal(integern,complexca,complex,dimension(*)cx,integerincx)CSCALPurpose: CSCAL scales a vector by a constant. ParametersN N is INTEGER number of elements in input vector(s) CA CA is COMPLEX On entry, CA specifies the scalar alpha. CX CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of CX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, linpack, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*) subroutinecsscal(integern,realsa,complex,dimension(*)cx,integerincx)CSSCALPurpose: CSSCAL scales a complex vector by a real constant. ParametersN N is INTEGER number of elements in input vector(s) SA SA is REAL On entry, SA specifies the scalar alpha. CX CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of CX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, linpack, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*) subroutinedscal(integern,doubleprecisionda,doubleprecision,dimension(*)dx,integerincx)DSCALPurpose: DSCAL scales a vector by a constant. uses unrolled loops for increment equal to 1. ParametersN N is INTEGER number of elements in input vector(s) DA DA is DOUBLE PRECISION On entry, DA specifies the scalar alpha. DX DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of DX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, linpack, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*) subroutinesscal(integern,realsa,real,dimension(*)sx,integerincx)SSCALPurpose: SSCAL scales a vector by a constant. uses unrolled loops for increment equal to 1. ParametersN N is INTEGER number of elements in input vector(s) SA SA is REAL On entry, SA specifies the scalar alpha. SX SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of SX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, linpack, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*) subroutinezdscal(integern,doubleprecisionda,complex*16,dimension(*)zx,integerincx)ZDSCALPurpose: ZDSCAL scales a vector by a constant. ParametersN N is INTEGER number of elements in input vector(s) DA DA is DOUBLE PRECISION On entry, DA specifies the scalar alpha. ZX ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of ZX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*) subroutinezscal(integern,complex*16za,complex*16,dimension(*)zx,integerincx)ZSCALPurpose: ZSCAL scales a vector by a constant. ParametersN N is INTEGER number of elements in input vector(s) ZA ZA is COMPLEX*16 On entry, ZA specifies the scalar alpha. ZX ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) INCX INCX is INTEGER storage spacing between elements of ZX Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. FurtherDetails: jack dongarra, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*)

Name

scal - scal: x = alpha x

Synopsis

Functions subroutine cscal (n, ca, cx, incx) CSCAL subroutine csscal (n, sa, cx, incx) CSSCAL subroutine dscal (n, da, dx, incx) DSCAL subroutine sscal (n, sa, sx, incx) SSCAL subroutine zdscal (n, da, zx, incx) ZDSCAL subroutine zscal (n, za, zx, incx) ZSCAL

See Also