how to apply a random force on a atom

From: q=E2=BA=E9=C3=F7?= (lsp04whm_at_zsu.edu.cn)
Date: Mon Jun 06 2005 - 12:31:46 CDT

i am a green hand to namd,now i want to do a simulation withing a random force
applying on a atom in a peptite in the whole simulation process.For example,i
want the force random in every step ,not only the size ,but also the
direction.Is there anyway ??? Can the tclforce meet this require???

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