Use the Input Matrix node (
![](images/comsol_ref_solver.27.188.1.png)
) to create the raw data of an assembled matrix or vector from Java. Right-click the
Eigenvalue Solver,
Stationary Solver, or
Time-Dependent Solver nodes and select
Input Matrix. Select the appropriate check boxes for the matrices and vectors you want to input and save the model as a file for Java. The saved Java file now contains code for inputting the selected matrices and vectors.