[ncl-talk] extra (echo) lines on plots

[Rick Brownrigg]

Hi Alison,

I think the issue is you want to set

   res at gsnDraw = False
   res at gsnFrame = False

This keeps the plot from drawing until you explicitly tell to.   Then at
the bottom of your loop, you'd have

  draw(plot)
  frame(wks)   ;; this might not be necessary?  Something's causing the
frame to advance

BTW, a hopefully helpful comments:   a lot of the resources you are setting
are static across plots. You might want to move those outside and prior to
the loop.

Rick


On Mon, Dec 11, 2017 at 3:08 PM, Alison Bridger <alison.bridger at sjsu.edu>
wrote:

> I am using gsn_csm_xy to make a fairly simple plot, embedded in a loop.
> The loop is over times in the output from a WRF run (it = 1,6 in the
> attached example).
>
> The quantity plotted is rain (RAINNC) so does not show up right away BUT -
> as soon as it starts plotting, I get an "echo" of the previous hour's line
> plot. Hence - 2 lines per plot, but should only be one.
>
> I feel like I am missing something - but can't think where to start on the
> FAQ or the NCL pages.
>
> Attached = code (xx.ncl), sample output (WEplt.ps).
>
> The code reads a "standard" wrfout file - hope you have one archived!
>
> Thanks
>
> --
>
>                  Alison F.C. Bridger
>                   Professor & Chair
>
>     Department of Meteorology and Climate Science
>
>     San Jose State University      tel  408.924.5206 <(408)%20924-5206>
>     One Washington Square          fax  408.924.5191 <(408)%20924-5191>
>     San Jose, CA 95192-0104
>
>              email:   Alison.Bridger at sjsu.edu
>
>        *Global CO2 levels...400 ppm and still rising...happy?*
>
>
>                  www.sjsu.edu/meteorology <http://www.met.sjsu.edu>
>
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