import mesh with the edited *.mphtxt file

Hi, everyone:

I have a geometry mesh, and I knew the mesh node's coordinates: x, y, z in matlab workspace.
I want to import the mesh into COMSOL , and set the point whose coordinates were knew as the mesh nodes .
How to do this? Do I need to write a *.mphtxt file of the mesh? And how to edit the *.mphtxt files?

THanks for your help.


YH