[gradsusr] plotting wind speed (or velocity) versus height rather than level number

[John D. Wilson]

Hi,

I'd like to plot a wind profile at fixed (X,Y,t). It's straightforward 
to plot (for instance) the u-component versus level number (``d 
ugrdhlev'') but I'd like instead to display u versus height, or u versus 
pressure, or u versus sigma. I expect this is really easy but I haven't 
yet stumbled on the trick. Can anyone help? Thanks, John