RE: DrawGraphics Figure-8 && CPU Strangeness
- To: mathgroup at smc.vnet.net
- Subject: [mg37523] RE: [mg37451] DrawGraphics Figure-8 && CPU Strangeness
- From: "DrBob" <drbob at bigfoot.com>
- Date: Sat, 2 Nov 2002 03:32:01 -0500 (EST)
- Reply-to: <drbob at bigfoot.com>
- Sender: owner-wri-mathgroup at wolfram.com
I hope Tech Support can help with this. When I run the Figure-8 animation, I get the "not enough memory to display a cell" message and then the "not enough memory to do what you asked" message. I have to close and reopen Mathematica to get a usable display. I have this problem with many animations (SpinShow, etc...) -- with or without DrawGraphics -- despite having 1024MB of RAM. I'm using version 4.2 and WinXP Home, and I had the same problem with version 4.1. The problem is very consistent, in that each animation either always works or never does. If I reduce the number of frames enough, the animation works. The Figure-8, for instance, works if I change the step size from 2Pi/50 to 8Pi/50. I have had no memory problems with other applications -- including SAS 8.2, Photoshop 7, Prime95, etc. Help? Bobby -----Original Message----- From: Steven T. Hatton [mailto:hattons at globalsymmetry.com] To: mathgroup at smc.vnet.net Subject: [mg37523] [mg37451] DrawGraphics Figure-8 && CPU Strangeness In a sense this problem gives me an excuse to call attention to one of the best uses I've seen a computer put to. The figure-8 Animation in David Park's DrawGraphics package is exactly the kind of graphical expression of the mathematics of physics which reviel more about the situation than pencile and paper lend themselves to. (People such as John A. Wheeler, and Hermann Weyl seem to have this kind of mechanism build into thier brains, and therefore don't need no stinkin' computer.) This is on SuSE Linux 8.1, P4/w 1 GIG of RAM. While I was exploring this animation I noticed something rather strange about the CPU's behavior. If I open Help Browser -> Add-Ons -> DrawGraphics -> Examples -> Figure Eight Animation, the CPU utilization is virtually 0. I evaluate the first cell to load the package and the CPU jumps for a second and then settles back down. I then select the remainder of the notebook. The CPU utilization remains very low. Then I evaluate it. The CPU utilization jumps way up, as is to be expected. The animation frames are created, and the animation runs fine. The CPU utilization remains very high. The interesting observation comes when I stop the animation by quitting the local kernel. If I select the cell holding the graphic, I notice the CPU utilization jups to 98%+-. The kernel isn't even running at this time. When I say I select the cell holding the graphic, I mean to say I select the brace to the right which has the 'foldable' indicator. Selecting the inner-most brace does not cause the CPU utilization to increase, but selecting any of its parents does. Can someone explain this? You can find the DrawGraphics package here: http://home.earthlink.net/~djmp/Mathematica.html -- STH Hatton's Law: "There is only One inviolable Law."