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SAXPYI/DAXPYI/CAXPYI/ZAXPYI | Sparse elementary vector operation |
Name SAXPYI/DAXPYI/CAXPYI/ZAXPYI
Sparse elementary vector operation
Purpose Given a real or complex scalar a, a sparse vector x stored in compact form via a set of indices and a dense vector y stored in full storage form, these subprograms perform the elementary vector operation
y ← ax + y.
More precisely, let x be a sparse
yki ← axi + yki, | i = 1, 2, …, m. |
Usage | VECLIB: |
|
| INTEGER*4 | m, indx(m) |
| REAL*4 | a, x(m), y(n) |
CALL SAXPYI(m, a, x, indx, y)
INTEGER*4 | m, indx(m) |
REAL*8 | a, x(m), y(n) |
CALL DAXPYI(m, a, x, indx, y)
INTEGER*4 | m, indx(m) |
COMPLEX*8 | a, x(m), y(n) |
CALL CAXPYI(m, a, x, indx, y)
INTEGER*4 | m, indx(m) |
COMPLEX*16 | a, x(m), y(n) |
CALL ZAXPYI(m, a, x, indx, y)
VECLIB8:
INTEGER*8 | m, indx(m) |
REAL*4 | a, x(m), y(n) |
CALL SAXPYI(m, a, x, indx, y)
INTEGER*8 | m, indx(m) |
REAL*8 | a, x(m), y(n) |
CALL DAXPYI(m, a, x, indx, y)
68HP MLIB User’s Guide