Re: A bug in ListPlot3D ?
- To: mathgroup at smc.vnet.net
- Subject: [mg66004] Re: [mg65906] A bug in ListPlot3D ?
- From: "Hui Fang" <fangh73 at xmu.edu.cn>
- Date: Wed, 26 Apr 2006 04:38:18 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Thanks for the help from you all. Now this problem is solved. I simply thought ListPlot3D is used and interpreted the same way as ListPlot. Hui Fang -----ÓʼþÔ¼þ----- ·¢¼þÈË: David Park [mailto:djmp at earthlink.net] ·¢ËÍʱ¼ä: 2006Äê4ÔÂ23ÈÕ 18:18 ÊÕ¼þÈË: mathgroup at smc.vnet.net Ö÷Ìâ: [mg65920] Re: [mg65906] A bug in ListPlot3D ? The plot looks all right to me. It is easy to misinterpret what ListPlot3D does. You have a 3 x 4 matrix of numbers. EACH and EVERY element in the array represents a z value. So the z range goes from -3 to 60. The x and y ranges go from 1 to the number of elements in each level of the array. That is, x goes from 1 to 3 and y goes from 1 to 4. Note that the three numbers you have in each list DO NOT represent the coordinates of a point. The data sample as you presented it does not contain any information as to what the x and y domains are. If you wanted to specify what they were you could use the MeshRange option in the plot. You may need to fit a surface to your data. We would have to know more about the nature of your actual data. You may have to use DeLaunayTriangulation. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Hui Fang [mailto:fangh73 at xmu.edu.cn] To: mathgroup at smc.vnet.net I'm trying to use ListPlot3D to show a interesting surface. However, the result is very confusing. Since my data is rather long, I'll just use 4 points to explain what happened. ListPlot3D[{{3,55,-3},{3,60,-3},{4,55,-2},{4,60,-2.5}}]