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On Mon, 25 Sep 2000, J. Correia wrote: > i am trying to display the deformation field using vectors...ie trying to > plot the axis of dilitation...ive tried to do the raw calculation all at > once but iget a "stack is empty" error... > i used gdwind and wrote 1/2 * atan2(d2,d1) (only in gempak language) as > the gvect. any idea? > jimmyc > > > Jimmy, Without showing me what your GVECT equation is, I'd have no clue, other than to say above that the output from ATAN2() is a scalar, not a vector. So, the possible problem is you haven't composed a vector to plot in GVECT. Steve Chiswell Unidata User Support