NAME¶
CSCAL - scales a vector by a constant.
SYNOPSIS¶
- subroutine cscal(n,ca,cx,incx)
c scales a vector by a constant. c jack dongarra, linpack, 3/11/78. c modified
to correct problem with negative increment, 8/21/90. complex ca,cx(1) integer
i,incx,ix,n if(n.le.0)return if(incx.eq.1)go to 20 c code for increment not
equal to 1 ix = 1 if(incx.lt.0)ix = (-n+1)*incx + 1 do 10 i = 1,n cx(ix) =
ca*cx(ix) ix = ix + incx 10 continue return c code for increment equal to 1 20
do 30 i = 1,n cx(i) = ca*cx(i) 30 continue return end
PURPOSE¶