Splotting of multi mesh data files can be controlled via the index modifier. A data file can contain more than one mesh, and in that case all meshes in the file will be splotted by default. Meshes are separated from each other, in the data file, by double blank lines. To splot a single mesh in a multi mesh file use the index modifier which specify which mesh to splot. First mesh is mesh 0.
Example:
splot ``data1'' index 2 with points
will splot the third mesh in file data1 with points.