No matrix has yet been loaded. An error has occurred. Solving linear systems For solving linear systems with an SLinSolver object, it must have previously been load ed with the matrix to use. This may save one copy operation, or may be used for solving different linear systems concurrently. Upon termination, this vector is cleared.
Some methods are available with two parameters for right hand-side vectors.
Then two system are solved in one method invocation. This should generally be faster than solving two systems seperately. Two types of result vectors are supported, Vector and SSVector . The change method is used to modify the loaded matrix by substituting column idx with the new vector subst . This may improve on the performance of the update.