(IS|ID|IC|IZ)AMAX¶

Single, double, single complex, and double complex AMAX.

Description¶

Returns the index of the element with the maximum absolute value.

BLAS Interface¶

qml_long isamax(const qml_long *N, const float *X, const qml_long *INCX);

qml_long idamax(const qml_long *N, const double *X, const qml_long *INCX);

qml_long icamax(const qml_long *N, const qml_single_complex *X,
                  const qml_long *INCX);

qml_long izamax(const qml_long *N, const qml_double_complex *X,
                  const qml_long *INCX);

CBLAS Interface¶

qml_long cblas_isamax(const qml_long N, const float *X, const qml_long INCX);

qml_long cblas_idamax(const qml_long N, const double *X, const qml_long INCX);

qml_long cblas_icamax(const qml_long N, const qml_single_complex *X,
                        const qml_long INCX);

qml_long cblas_izamax(const qml_long N, const qml_double_complex *X,
                        const qml_long INCX);

Arguments¶

N	Number of elements in X
X	Input vector, must be at least: $(\fvar{N}-1)\mult\abs{\fvar{INCX}} + 1$
INCX	Distance between individual elements in X
Result	Index of element with maximum absolute value