# naginterfaces.library.blas.izamax¶

naginterfaces.library.blas.izamax(x)[source]

izamax computes the index of the absolutely largest component of a complex vector.

For full information please refer to the NAG Library document for f06jm

https://www.nag.com/numeric/nl/nagdoc_28.7/flhtml/f06/f06jmf.html

Parameters
xcomplex, array-like, shape

The -element vector .

Returns
imaxint

The index of the absolutely largest component of a complex vector, .

Raises
NagValueError
(errno )

On entry, error in parameter .

Constraint: .

Notes

No equivalent traditional C interface for this routine exists in the NAG Library.

izamax returns the smallest index such that

where is an -element complex vector.

References

Lawson, C L, Hanson, R J, Kincaid, D R and Krogh, F T, 1979, Basic linear algebra supbrograms for Fortran usage, ACM Trans. Math. Software (5), 308–325