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Re: CONTOURing one dimension data [message #79163 is a reply to message #79162]

Tue, 07 February 2012 12:11

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

On Feb 7, 12:46 am, shambhu <shambhu.mc...@gmail.com> wrote:
> Hi,
>
> I have a structured data of one dimension (ex: data.field14). I want
> to contour it over a continents map. How to CONTOUR one dimension
> data.
>
> Please help me.

Hi,

I'm not sure I understand completely, but since a contour identifies
groups of similar value in a set, then you could use VALUE_LOCATE to
group your data.

x = randomu(seed, 100)
plot,x

; use value_locate to assign x-values into the sets 0-0.25,
0.25-0.5, ... left side open, right side closed (I think)
ix = VALUE_LOCATE([0.0, 0.25, 0.5, 0.75], x)

;
; Dr. Fanning, please don't look. Thanks.
;
device, decomposed = 0
tek_color
for i = 0, 99 do plots,i,x[i], psym = 6, col = ix[i] + 1

Is that what you mean? I'm a little fuzzy about putting it on a map.
Without locational info, how would you know where to place it on the
map?

If you actually have Lon, Lat values associated with each of your
points, then you can use

cgContour, data, lon, lat, ...

and you are good to go! http://www.idlcoyote.com/idldoc/cg/cgcontour.html

Cheers,
Ben

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[Message index]

		Re: CONTOURing one dimension data By: Russell[1] on Tue, 07 February 2012 20:15
		Re: CONTOURing one dimension data By: Brian Wolven on Tue, 07 February 2012 12:44
		Re: CONTOURing one dimension data By: ben.bighair on Tue, 07 February 2012 12:45
		Re: CONTOURing one dimension data By: David Fanning on Tue, 07 February 2012 12:27
		Re: CONTOURing one dimension data By: ben.bighair on Tue, 07 February 2012 12:11
		Re: CONTOURing one dimension data By: shambhu on Tue, 07 February 2012 22:10

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