[Gmsh] Locating the node number nearest to a given point in space

[Shobhit Jain]

Hi all, 
starting from the .msh file for a model, I would like to find the node 
corresponding (or nearest) to a given point in space (x,y,z coordinates 
known). Does GMSH have such an options. If not, any ideas could be of great 
help.
Thanks in advance.
Shobhit
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