# naginterfaces.library.blas.zdotci¶

naginterfaces.library.blas.zdotci(x, indx, y)[source]

zdotci computes the scalar product of a conjugated sparse complex vector with a complex vector.

For full information please refer to the NAG Library document for f06gs

https://www.nag.com/numeric/nl/nagdoc_28.7/flhtml/f06/f06gsf.html

Parameters
xcomplex, array-like, shape

The compressed vector . contains for .

indxint, array-like, shape

must contain the set of indices .

ycomplex, array-like, shape

The vector . Only elements corresponding to indices in are accessed.

Returns
zdccomplex

The value of the scalar product.

Notes

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

zdotci returns the value of the scalar product

where is a sparse complex vector stored in compressed form, and is a complex vector in full storage form.

References

Dodson, D S, Grimes, R G and Lewis, J G, 1991, Sparse extensions to the Fortran basic linear algebra subprograms, ACM Trans. Math. Software (17), 253–263