Need a hint - how to automatically draw "H" and "L" into a pressure chart

[Stephen R McMillan]

Ah! So you meant how to auto-find the H and L locations, not just draw the 
symbols.  You can use a combination of the maxloc and max, or minloc and 
min, functions. I would check out the clhilo udf that Matias suggested 
(thanks for mentioning, Matias). I have not used that one personally. Let 
us know if it works for your project!

Stephen
'



Stefan Gofferje <gradsusers at GOFFERJE.HOMELINUX.ORG> 
Sent by: GRADSUSR at LIST.CINECA.IT
02/18/2008 04:33 PM
Please respond to
GRADSUSR at LIST.CINECA.IT by 02/20/2008


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Subject
Re: Need a hint - how to automatically draw "H" and "L" into a  pressure 
chart





Hi,

Stephen R McMillan schrieb:
> For "H" example, try
> 'draw string 'x' 'y' H' where x and y are screen coordinates. Use 'set
> font...',  'set strsiz...' and 'set string...' before the draw for
> additional controls.

I see, I really did not find the right words... :).
What I meant was a formula or an expression how to draw a "H" to the
right place to mark a high pressure area.

So I have a grid with pressure data and I want to have "H" and "L"
automatically drawn to the right places i.e. where the pressure is high
or low.

I have been experimenting with maskout() but this is not satisfactory as
I couldn't get letters from this and as "H" and "L" are pretty relative
marks, depending on the synoptic situation.

Tervehdys Suomesta,
Stefan Gofferje

--
Since light travels faster than sound, is that why some people appear
bright until you hear them speak?




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