Maximum of magnitudes | SAMAX/DAMAX/IAMAX/SCAMAX/DZAMAX | |
| INTEGER*4 | n, incx |
| REAL*8 | s, DZAMAX |
| COMPLEX*16 | x(lenx) |
| s = DZAMAX(n, x, incx) | |
| VECLIB8: |
|
| INTEGER*8 | n, incx |
| REAL*4 | s, SAMAX, x(lenx) |
| s = SAMAX(n, x, incx) | |
| INTEGER*8 | n, incx |
| REAL*8 | s, DAMAX, x(lenx) |
| s = DAMAX(n, x, incx) | |
| INTEGER*8 | n, incx, s, IAMAX, x(lenx) |
| s = IAMAX(n, x, incx) | |
| INTEGER*8 | n, incx |
| REAL*4 | s, SCAMAX |
| COMPLEX*8 | x(lenx) |
| s = SCAMAX(n, x, incx) | |
| INTEGER*8 | n, incx |
| REAL*8 | s, DZAMAX |
| COMPLEX*16 | x(lenx) |
| s = DZAMAX(n, x, incx) | |
Input | n | Number of elements of vector x to be used. If n ≤ 0, the |
|
| subprograms do not reference x. |
| x | Array of length lenx = (n−1)⋅incx+1 containing the |
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| |
| incx | Increment for the array x. x is stored forward in array x |
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| with increment incx; that is, xi is stored in |
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| x((i−1)⋅incx+1). |
|
| Use incx = 1 if the vector x is stored contiguously in |
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| array x; that is, if xi is stored in x(i). Refer to “BLAS |
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| Indexing Conventions” in the introduction to this |
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| chapter. |
Output | s | If n ≤ 0, then s = 0. Otherwise, s is the maximum of the |
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| magnitudes of the elements of x. |
Chapter 2 Basic Vector Operations 57