[gradsusr] plotting time in hovmoller pictures

[Austin Conaty]

Liping,
If you go to this web page:
http://grads.iges.org/grads/gadoc/gadocindex.html
and then read about vpage and/or parea you'll see what you
need to do to tell grads where to draw the plots.

Using vpage you can designate half the page for one plot,
then plot it, then use vpage to designate the other half of the
page for plotting the second plot.

If you want to connect the 2 plots, you may need to use
parea, but I believe vpage is the recommended way to
work with multiple plots on a single page.


Liping Liu wrote:
> Hi,   (I am a new user of GrADs)
>
> I am trying to plot two hovmollers into one figure. The problem is the time.
> First I plot the hovmollers using data from file 1 for Aug10 to Aug15, with the following commands:
>
> 'set yflip on'
> 'set lev 1000'
> 'set tlsupp year'
> 'set t 2 48'
> 'set lat 15'
> 'set gxout shaded'
> 'set grads off'
> 'd ave(olr.1,lat=5,lat=25)'
>
> So it gives me a figure for Aug10--Aug15. But, when I repeat the plotting for another period of time Aug15-Aug20:
>
> 'set t 49 80'
> 'd ave(olr.2,lat=5,lat=25)'
>
> It will simply overlap the whole figure, the time is not sequenced.
>
> Question: what do I do to get the pictures of Aug10-15 and Aug15-20 laid out vertically (not overlapping each other)?
>
> An alternative way is to write the two sets of data into one data file. But I don't know how to do that either.
>
> Thanks for your help. Suggestions to either of the approaches are greatly appreciated!
>
> Liping
>
>
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-- 
Austin Conaty, SAIC        Global Modeling & Assimilation Office
301-614-6149 (ph)          NASA Goddard Space Flight Center
301-614-6297 (fax)         Code 610.1 Greenbelt, MD 20771

Austin.L.Conaty at .nasa.gov
  
http://gmao.gsfc.nasa.gov