Truncated SVD factorization result

Stores the rank-k truncated singular value decomposition of an aMatrix as returned by svd_factor. Left and right singular vectors are kept as base R matrices so they are always host-accessible; optional adgeMatrix copies of t(u) and v may be present for GPU-accelerated projection.

Slots

u

Numeric matrix of left singular vectors; nrow(u) equals the number of rows of the source matrix and ncol(u) equals k.

d

Numeric vector of singular values of length k, in descending order.

v

Numeric matrix of right singular vectors; nrow(v) equals the number of columns of the source matrix and ncol(v) equals k.

k

Integer; the requested rank.

method

Character string; one of "exact", "rsvd", or "subspace".

engine

Character string identifying the low-level solver used (e.g., "exact_svd", "irlba_svdr", "backend_rsvd").

source_id

Character string; the object_id of the source aMatrix.

precision

Character string; "strict" or "fast".

backend

Character string; the backend that computed the SVD.

ut_am

Either an adgeMatrix holding t(u) for GPU matrix-multiply routing, or NULL on CPU paths.

v_am

Either an adgeMatrix holding v for GPU matrix-multiply routing, or NULL on CPU paths.

See also

svd_factor, svd_project, svd_reconstruct