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bakul3
USA
1 Posts |
 Posted - 08/05/2003 : 11:17:47 AM
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Hi there!
I am trying to find a software that helps me plot a specific 3-D scenario related to Chemical Reaction Engineering:
I have a cylindrical chemical reactor with 20 x 16 points distributed at various XYZ ( or r, h, theta) locations within this cylidrical body. These points represent the positions of temperature measurement devices (thermocouples), and hence have temperature values associated with each such grid-point.
Now, I wish to draw a plot with the cylinder in 3-D, and the temperature (fourth parameter )denoted in color spectrum.
1. Is it possible to do that in ORIGIN ?
2. If yes, then how?
3. Can the resulting plot be copied and pasted-as-a-picture in MS-Word?
4. Is it possible to juxtapose various such 3-D plots to make a-sort-of-a movie?
5. As an unrelated question, are there any statistical data-mining techniques in ORIGIN? If yes, then plz let me know where I can find more info about this.
Thank you!
Edited by - bakul3 on 08/05/2003 11:19:20 AM |
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easwar
USA
1965 Posts |
Posted - 08/06/2003 : 11:21:12 AM
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Hi,
Origin does not currently support cylindrical 3D plots. However, you could transform your (r,theta,z) data to (x,y,z) and then plot it in Origin.
Once the data is in (x,y,z) format, you can create 3D scatter and trajectory plots. You can also run various gridding routines to convert your (x,y,z) data to a matrix grid and then create surface plots, contour plots etc.
If you create a 3D scatter/trajectory plot from (x,y,z) data, you can then designate a fourth column and use the data in that column to assign a color map to the plotted scatter points. A sample graph that shows this feature is pasted below.
Once the graph is created, you can copy-paste it to other applications, or export to various formats etc.
Currently there is no movie capability built in. You could export multiple graph frames to GIF files for example and create an animated GIF outside of Origin.
The built-in statistical tools in Origin do not currently offer any data mining capabilities, but the latest version comes with a selection of the NAG numerical libraries, and there are many statistical functions in those library chapters that could be useful to you. The NAG functions are easily accessible from the Origin C programming environment.
Hope this helps. If there are further questions, please post.
Easwar
OriginLab.
Edited by - easwar on 08/06/2003 11:23:28 AM |
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sagar
USA
6 Posts |
Posted - 08/14/2003 : 5:32:02 PM
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Eswar,
That sounds interesting. Could you please tell me how to assign the fourth column for assigning colors?
Thanks,
Sagar
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easwar
USA
1965 Posts |
Posted - 08/15/2003 : 10:31:08 AM
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quote:
Could you please tell me how to assign the fourth column for assigning colors?
Hi Sagar,
1> Let's assume your X,Y,Z data are in columns A,B,C of a worksheet.
2> Add another column, D, and place your fourth variable in there, which will be used for color mapping
3> Set column C to be of type Z (right-click on col C header and pick Set As from context menu and then pick Z)
4> Highlight column C (click on header of column) and then use to the menu Plot->3DXYZ->Trajectory. This will created the 3D trajectory plot.
5> Right-click inside the plot, and pick Plot Details from context menu. You should be on the Symbol tab - if not, go to Symbol tab
6> On Symbol tab, change plot symbol to filled circle (if not already that). Then, under Symbol Color, pick Color Mapping, and then col(D). This will make the fill color of the symbols to be based on a color map that uses the values in col D.
7> You can then customize the color map by going to the Color Map tab and clicking on Level, Fill etc. to set color level and what colors to use for filling etc. And you can do other customization such removing drop lines etc.
8> To show the color map on the graph, exit the Plot Details dialog, and then use the menu item Graph->New Color Scale. You can double-click on the color scale to customize that, such as changing font, thickness of color scale etc.
Note that such color mapping is not limited to 3D plots - can also be used in 2D plots where a third variable is used to set the color map. Also, the coloring can be indexing on a dataset, or can also be direct RGB value specified in a dataset etc.
Easwar
OriginLab.
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3-D Cylinder plot