Forms the 1-norm of the complex vector using the true absolute value.
Given a complex vector cx, scsum1/dzsum1 functions take the sum of the absolute values of vector elements and return a single/double precision result, respectively. These functions are based on scasum/dzasum from Level 1 BLAS, but use the true absolute value and were designed for use with clacon/zlacon.
INTEGER. Specifies the number of elements in the vector cx.
COMPLEX for scsum1
DOUBLE COMPLEX for dzsum1
Array, DIMENSION at least
Contains the input vector whose elements will be summed.
INTEGER. Specifies the spacing between successive elements of cx (incx > 0).