Hi sreekanth, A basic guide is available at; http://www.iges.org/grads/gadoc/tutorial.html Muhammad Rahiz Researcher & DPhil Candidate (Climate Systems & Policy) School of Geography & the Environment University of Oxford On Tue, 28 Dec 2010, SREEKANTH T.S wrote: > I'm trying to learn grads, I want to plot graphs with TRMM data can any one help > me. > >