[gradsusr] Selective display when using gxout vector and gxout stream

[Davide Sacchetti]

you can use maskout, eg.:
display maskout(u,mag(u,v)-30);v
bye bye
Davide

On Sun, 2013-03-24 at 20:56 +0800, Muhammad Yunus Ahmad Mazuki wrote:
> Hi,
> 
> When gxout contour and shaded is used, one can use set clev and set
> set ccols to display levels that are only interested in and set the
> colours as well. One application of this is one can create a plot
> where values below certain point will not be displayed, such as
> displaying only zonal wind in the range of 30 m/s to 40 m/s.
> 
> What I would like to know is, is it possible to control the  display
> of gxout stream and gxout vector in this way as well. I know the plots
> will have some unplotted paches, but my purpose is to highlight only
> certain areas only. I'm trying to plot anomalies in vector and stream,
> and would like to filter the anomalies, so that only values that are
> bigger than 3.0 (example) will be plotted. Has anyone try this before?
> 
> Yunus.
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Davide Sacchetti
Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
ARPAL Unità Tecnica Complessa di livello Regionale
V.le Brigare Partigiane 2 16121 Genova (I)
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mail: davide.sacchetti at arpal.gov.it     web: www.meteoliguria.it