scipy.linalg.blas.dspr2#
- scipy.linalg.blas.dspr2(n, alpha, x, y, ap, incx=1, offx=0, incy=1, offy=0, lower=0, overwrite_ap=0) = <fblas function dspr2>#
Packed symmetric rank-2 update
ap = alpha*(outer(x, y) + outer(y, x)) + ap(BLASdspr2).- Parameters:
- nint
Order of the matrix.
- alphafloat
Scalar multiplier.
- xndarray
First input vector.
- yndarray
Second input vector.
- apndarray
symmetric matrix in packed storage, updated in place.
- incxint, optional
Stride between successive elements of x. Default is 1.
- offxint, optional
Index of the first element of x to use. Default is 0.
- incyint, optional
Stride between successive elements of y. Default is 1.
- offyint, optional
Index of the first element of y to use. Default is 0.
- lowerint, optional
If 0, the upper triangle is used; if 1, the lower. Default is 0.
- overwrite_apint, optional
If nonzero, ap may be overwritten in place. Default is 0.
- Returns:
- apndarray
The updated packed matrix.