We are experimenting with the use of VRML
(Virtual Reality Modeling Language) to enable 3D interactive exploration of sparse matrices. The
following are VRML models of the cityplots of
several matrices in the Matrix Market. VRML allows one to manipulate these
visualizations as three-dimensional objects. To view the demos you will need a
VRML
browser or plugin. Clicking on the matrix in the VRML browser will link to
the Web page about the Matrix.

"Version 2" refers to the
VRML Specification level
which must be supported by your browser in order to view the model.

These data files are compressed.
Help is available if you are
having trouble downloading them.

We have generated VRML cityplots for 232
matrices. For matrices with more than 4,000 entries only the front face of
each 3D bar (representing a single matrix entry) is drawn in order to reduce
the size of the VRML files. VRML cityplots for matrices with more than 24,000
have not been generated due to their large sizes. Of those included, 29 of the
files are greater than 500Kb with the largest being 800Kb.

We would appreciate feedback on these visualizations.
If they prove useful we will make more available.