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Re: How to clear an object plot [message #72796 is a reply to message #72795]

Tue, 05 October 2010 10:36

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Oct 5, 2:06 pm, Jean <jeanbilh...@gmail.com> wrote:
> #1 I'm calling the new IDL 8.0 plot feature object plot has an
> official name has been found for this guy ? :-)

The official name is Graphics. But people often call them New Graphics
(NG), to distinguish from Direct Graphics (DG) and Object Graphics (OG
- in the sense of handling OG directly, since NG is made from OG
objects).

> #2 I'm creating a very simple plot> _p = plot(indgen(10))
>
> but now I want to very quickly display another using the same _p
> window. Closing this one and creating a new one won't work because I
> need to do this at a very high rate.
>
> To get the full story, I have an application that shows a 2d image
> (using tvscl). When the user moves his mouse over this image, the z vs
> x and z vs y are plotted in 2 differents plot objects.
>
> I tried to use _p.select and _p = plot(<new plot>) but this plots the
> new data on top of the old one.

I think what you want is to replace the data in the plot. If so, you
could use the putdata method. An example:

IDL> p=plot(/test) ;Make some plot with the example data
% Loaded DLM: XML.
IDL> d=p.data ;Retrieve the data in the plot
IDL> help,d
D FLOAT = Array[3, 200]
IDL> d=d[*,0:50]*2d0 ;Make some new data for the plot
IDL> p.putdata,d ;Replace the plot data

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[Message index]

		Re: How to clear an object plot By: Paul Van Delst[1] on Tue, 05 October 2010 15:18
		Re: How to clear an object plot By: Paul Van Delst[1] on Tue, 05 October 2010 15:13
		Re: How to clear an object plot By: David Fanning on Tue, 05 October 2010 13:22
		Re: How to clear an object plot By: Jean[2] on Tue, 05 October 2010 12:55
		Re: How to clear an object plot By: David Fanning on Tue, 05 October 2010 11:23
		Re: How to clear an object plot By: penteado on Tue, 05 October 2010 10:57
		Re: How to clear an object plot By: David Fanning on Tue, 05 October 2010 10:39
		Re: How to clear an object plot By: penteado on Tue, 05 October 2010 10:36

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