COMBDISPDIR,<Xfile>,<Yfile>,<Zfile>,<Comb>
Specific to the RELDISP relative displacement databases. Combine the three directional displacement component history binary databases for the principal components (as X-X or Y-Y or Z-Z) with the coupling responses (as Y-X, Z-X or X-Y, Z-Y or X-Z, Y-Z) into a single input direction displacement database. It should be used before COMBDISPDB command