[gradsusr] how to make two figures using the same time axis?

Jeff Duda jeffduda319 at gmail.com
Tue Apr 12 13:50:36 EDT 2016

Use 'set parea' to force the plotting area to be in the same position. You
can then use ylpos and a clever combination of vrange and ylint to make the
second field plot with tick labels on the right side of the plotting window
in such a way that the tick marks align.

I used the code below to generate the attached example image:
ga-> set parea 0.5 10.5 0.5 8
ga-> set lev 900 200
LEV set to 900 200
ga-> d ugrdprs;vgrdprs
Notice:  Automatic Grid Interpolation Taking Place
ga-> set z 1
LEV set to 1000 1000
ga-> set ylpos 0 r
SET YLPOS values:  Offset = 0  Side = Right
ga-> set vrange 1007 1014
1-D axis limits set: 1007 to 1014
ga-> set ylint 0.5
ylint = 0.5
ga-> d prmslmsl/100

Jeff Duda

On Tue, Apr 12, 2016 at 12:35 AM, Xingang Lyu <lxg at fio.org.cn> wrote:

> Dear GrADS users,
> I am trying to plot two time-relevant figures on a fixed (lon, lat) site.
> One is the time curve for Lifting Index (a 2D variable), the other is the
> Time-Pressure revolution figure for u-v vectors (3-D variable). My question
> is, how to make these two figures using the same time axis? see the
> attachment, please. Thanks.
> Regards,
> Gary Lyu
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr

Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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