rowadd

CholeskyFactor.rowadd(k, C)[source]

Add a row to a sparse LDL factorization.

Compute a rank-1 update of a sparse LDL factorization. This method “adds” a row by setting the \(k^{th}\) row and column of the original matrix to C.

Parameters:

  • k (int \(\in [0, N)\)) – The row/column index to modify.

  • C ((N, 1) csc_array, optional) – If given, change the factorization such that row and column k of the original matrix equal C. The number of rows must match that of L and D.

Returns:

  • CholeskyFactor – The current object, for method chaining.

  • .. versionadded:: 0.5.0