SPQRInfo¶

class sksparse.spqr.SPQRInfo[source]¶

A dataclass to hold SPQR info statistics.

nnzR_upper_bound[source]¶

Bound on the number of nonzeros in R.

Type:: int

nnzH_upper_bound[source]¶

Bound on the number of nonzeros in H.

Type:: int

nf[source]¶

Number of frontal matrices.

Type:: int

rank_A_estimate[source]¶

Estimated rank of A.

Type:: int

n1cols[source]¶

Number of singleton columns.

Type:: int

n1rows[source]¶

Number of singleton rows.

Type:: int

ordering[source]¶

Ordering method used.

Type:: str

memory[source]¶

Memory usage in bytes.

Type:: int

flops_upper_bound[source]¶

Upper bound on flop count (excluding backsolve).

Type:: int

tol[source]¶

Column norm tolerance used.

Type:: float

norm_E_fro[source]¶

Norm of dropped diagonal of R.

Type:: float

analyze_time[source]¶

Time taken for the symbolic analysis in seconds.

Type:: float

factorize_time[source]¶

Time take for the numeric factorization (including applying Q.T)

Type:: int

solve_time[source]¶

Time taken for the backsolve only \(R x = Q^T b\) in seconds.

Type:: int

total_time[source]¶

Total time in seconds.

Type:: int

flops[source]¶

Actual flops for the factorization and solve (including backsolve).

Type:: int

Added in version 0.5.0.

Methods

__init__