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2D array as colour dot image [message #82704]

Mon, 14 January 2013 12:22

markjamie
Messages: 30
Registered: November 2012

Member

Hi

Think I'm having a slow day as I'm sure the answer to this will be obvious...

I'm trying to use the new / function graphics in IDL8 to plot a 2D array as a colour scaled dotted plot, where each dot represents the value of an element in the array. In essence, the plots I'm trying to create are similar to those featured throughout this presentation http://www.insinume2012.com/downloads/pdf/Session_2/2.4._Zha ng.pdf (see slides 5, 6, 7, 9, 10, 11, 12, 13).

I've done similar things in the past with direct graphics using shade_surf and automatically rotating the surface so the view is "top down". I've tried this with surface in function graphics and while it works, when the number of points gets large it becomes very slow...

Is there any way to do it in function graphics with a 2D image plot?

Given an image is just an array of pixels it seems like it would be obvious.....like I say, think I'm just having a slow day!

Cheers

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[Message index]

		2D array as colour dot image By: markjamie on Mon, 14 January 2013 12:22
		Re: 2D array as colour dot image By: David Fanning on Wed, 16 January 2013 07:11
		Re: 2D array as colour dot image By: markjamie on Thu, 24 January 2013 16:15
		Re: 2D array as colour dot image By: chris_torrence@NOSPAM on Tue, 15 January 2013 20:28
		Re: 2D array as colour dot image By: markjamie on Tue, 15 January 2013 16:06
		Re: 2D array as colour dot image By: markjamie on Tue, 15 January 2013 15:56
		Re: 2D array as colour dot image By: markjamie on Tue, 15 January 2013 15:35
		Re: 2D array as colour dot image By: chris_torrence@NOSPAM on Tue, 15 January 2013 10:06
		Re: 2D array as colour dot image By: cgguido on Mon, 14 January 2013 15:01
		2D array as colour dot image By: markjamie on Mon, 14 January 2013 14:44
		Re: 2D array as colour dot image By: David Fanning on Thu, 24 January 2013 16:25

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