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Re: plot [message #68503 is a reply to message #7831]

Fri, 30 October 2009 08:01

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

bing999 writes:

> Yes, thank you, thats it.
> Nevertheless, it is not accurate enough for what i want... The lines
> it draws connect "extreme" points and then do not pass by all
> "important" points.
> Clearly, the problem is as follows:
>
> T
> a
> aa
> aaa
> Zaaaaa
> Paaaaaaaaaaaaaaaaaaaaaaaaaaaaa
>
> with convex_hull.pro, a line connects directly the data points T to P
> whereas i would like to connect T to Z and then Z to P.
>
> Can it be done by modifying convex_hull.pro?

No, you will probably have to write the ImportantPointLocater
code yourself. Then just connect them with PLOTS. :-)

Although, after my shower, it occurs to me that what
you want *may* be an active contour in which you start
from the convex hull and "shrink" the contour based on
the weights of the points inside the convex hull.

http://www.dfanning.com/ip_tips/snakes.html

That would be quite a bit harder to write than an connect-the-dots
one-off for doing this interactively.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		plot By: collier on Fri, 10 January 1997 00:00
		Re: plot By: David Fanning on Thu, 20 November 2003 05:52
		Re: plot By: Jeremy Bailin on Sat, 31 October 2009 07:39
		Re: plot By: pgrigis on Fri, 30 October 2009 13:57
		Re: plot By: David Fanning on Fri, 30 October 2009 13:47
		Re: plot By: pgrigis on Fri, 30 October 2009 12:58
		Re: plot By: David Fanning on Fri, 30 October 2009 12:39
		Re: plot By: pgrigis on Fri, 30 October 2009 12:32
		Re: plot By: R.G.Stockwell on Fri, 30 October 2009 11:53
		Re: plot By: Thibault Garel on Fri, 30 October 2009 09:50
		Re: plot By: David Fanning on Fri, 30 October 2009 09:33
		Re: plot By: Thibault Garel on Fri, 30 October 2009 09:23
		Re: plot By: rogass on Mon, 02 November 2009 15:25
		Re: plot By: David Fanning on Fri, 30 October 2009 08:01
		Re: plot By: Thibault Garel on Fri, 30 October 2009 07:25
		Re: plot By: David Fanning on Fri, 30 October 2009 06:06
		Re: plot By: Thibault Garel on Fri, 30 October 2009 05:55
		Re: plot By: David Fanning on Fri, 30 October 2009 05:11
		Re: plot By: pgrigis on Tue, 03 November 2009 06:41
		Re: plot By: greg.addr on Thu, 05 November 2009 03:35
		Re: plot By: rogass on Mon, 30 November 2009 23:56
		Re: plot By: David Fanning on Tue, 01 December 2009 05:08
		Re: Plot By: David Fanning on Fri, 09 December 2011 12:44
		Re: Plot By: David Fanning on Fri, 09 December 2011 12:34
		Re: Plot By: Russell[1] on Fri, 09 December 2011 12:23
		Re: Plot By: d.poreh on Fri, 09 December 2011 11:46
		Re: Plot By: d.poreh on Fri, 09 December 2011 10:28
		Re: Plot By: Russell[1] on Fri, 09 December 2011 08:09
		Re: Plot By: David Fanning on Fri, 09 December 2011 07:38
		Re: Plot By: d.poreh on Tue, 13 December 2011 10:20
		Re: Plot By: d.poreh on Mon, 19 December 2011 05:10
		Re: Plot By: Mark Piper on Tue, 13 December 2011 08:18
		Re: Plot By: d.poreh on Sat, 10 December 2011 06:09
		Re: Plot By: David Fanning on Sat, 10 December 2011 06:39
		Re: plot By: d.poreh on Sat, 21 July 2012 12:59
		Re: plot By: David Fanning on Sat, 21 July 2012 11:10
		Re: plot By: d.poreh on Sat, 21 July 2012 11:01
		Re: plot By: lecacheux.alain on Sat, 21 July 2012 06:44
		Re: plot By: David Fanning on Sat, 21 July 2012 06:14
		Re: Plot By: d.poreh on Fri, 15 February 2013 05:52
		Re: Plot By: David Fanning on Fri, 15 February 2013 05:40

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