R: Set Matrix via Pointer

Rmumps__set_mat_ptr {rmumps} | R Documentation

## Set Matrix via Pointer

### Description

This is a C wrapper to `Rmumps::set_mat_ptr(a)` method. Available in R too. In C++ code can be used as `rmumps::Rmumps__set_mat_ptr(pm)`. Using this method invalidates previous numeric decomposition (but not symbolic one).

### Usage

    Rmumps__set_mat_ptr(pm, pa)

### Arguments

`pm` | pointer of type XPtr<Rmumps>, object having sparse matrix to be replaced with second parameter
`pa` | pointer of type XPtr<double>, value vector from sparse triplet providing a new matrix. Structure of the new matrix must be identical to the old one. That's why there is no need to provide i and j for the new triplet.

[Package rmumps version 5.2.1-12 Index]