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babu
Germany
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 Posted - 11/25/2003 : 08:49:44 AM
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Hi all,
I want to have a contour plot with XYZ values(cyclindrical co-ordinate). The values are in random order. I have problem with matrix conversion. My worksheet has 1080 cells and some zero values are also there.
I would be grateful if anybody helps me.
bye
Babu. |
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easwar
USA
1965 Posts |
Posted - 11/25/2003 : 2:41:44 PM
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Hi Babu,
Origin currently does not support plotting in cylindrical co-ordinates. You will need to first transform your data to rectangular co-ordinates. Once you have the data in XYZ, you will need to first convert the XYZ data to a matrix. You can do this by setting the third column which holds Z values to be of type Z, click and select this column, and the use the Edit->Convert to Matrix menu. There are many conversion methods. If your XYZ data is regularly spaced - both X and Y are regularly spaced and for each X there is a corresponding - you can use Regular Conversion. If the data are regularly spaced, but some X-Y pairs are missing, you can used Sparse conversion. And if the spacing in X, Y is not regular, you need to use a random gridding routine. There are five choices of random gridding in version 7 and higher.
Hope this helps.
Easwar
OriginLab.
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babu
Germany
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Posted - 11/28/2003 : 07:16:37 AM
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Hi Easwar,
Thanks for ur prompt reply. I dont know how to convert my cylinderical co-ordinates to rectangualr co-ordiantes. the one way i got is making the edge values to zero to get rectangular co-ordinates, but it doesnt work out. Can u plse tell me the possiblities how to change the cylinderical co-ordinates to rect..
Also i want one more help from u, i have some values like below:
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
and i want origin to do automatically like this,
1
2
3
4
5
.
.
16
I have totally 1080 values and with more than 5 digits.
I hope you can surely help me reg this.
Expecting ur reply,
bye
Babu.
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Mike Buess
USA
3037 Posts |
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babu
Germany
Posts |
Posted - 11/28/2003 : 08:51:16 AM
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Thank u very much, Mike.
Babu |
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easwar
USA
1965 Posts |
Posted - 11/28/2003 : 10:40:35 PM
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quote:
I dont know how to convert my cylinderical co-ordinates to rectangualr co-ordiantes.
Hi Babu,
Say your orignial data is in three columns A,B,C and the data represents r, theta, z respectively, in cylindrical coordinates.
You can use the transformation equations:
x=r*cos(theta)
y=r*sin(theta)
z=z
> Go to Tools|Options menu item and in the dialog that comes up, go to the Numeric Format tab. Under Angular Units, select appropriate unit for your theta
> Add three more columns D, E, F to the worksheet
> rt-click on col D, and select Set Col Value from context menu
> set the formula to
col(D)=col(A)*cos(col(B))
> set formula for col E to:
col(E)=col(A)*sin(col(B))
> set formula for col F to:
col(F)=col(C)
> Now set col F to be of type Z.
> Highlight col F and use menu item Edit|Convert to Matrix to convert your transformed rectangular coordinate data to a matrix to make the contour plot etc.
Easwar
OriginLab.
Edited by - easwar on 11/28/2003 10:43:30 PM |
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babu
Germany
Posts |
Posted - 12/02/2003 : 08:49:58 AM
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Hi Easwar,
Thanks for ur reply. I did whatever u said, but now my problem is as follows:
After all conversion, and when i tried to convert to matrix (XYZ Irregular) it says "doubble XY pair found". I have same z values for some xy pairs.
How to deal this problem?
Bye
Babu. |
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easwar
USA
1965 Posts |
Posted - 12/02/2003 : 10:16:42 AM
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Hi Babu,
I presume you are using a version older than 7. In version 7 and higher, we look for duplicates and replace them with mean value of the z's.
So in your case, you will need to replace duplicates yourself (with some LabTalk code for instance, ro remove them manually) and then run the conversion.
Easwar
OriginLab.
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babu
Germany
Posts |
Posted - 12/04/2003 : 07:57:47 AM
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hi easwar,
I m using OriginPro 7G in my institute.
Bye
Babu |
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easwar
USA
1965 Posts |
Posted - 12/04/2003 : 2:01:26 PM
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Hi Babu,
I tested using 7GSR4 and duplicates are replaced with mean value for Z. Maybe the removing duplicates was added in a later service release. You can patch your version 7 using the latest SR4 release:
http://www.originlab.com/index.aspx?s=12&lm=+64
Easwar
OriginLab.
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babu
Germany
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Posted - 12/12/2003 : 05:48:24 AM
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Dear Easwar,
I had updated the version. Now i am facing the following problem.
1, I have 1080 'z' values. When i do the calculation with all 'z' values then origin calcuate something wrong results, but with limited values(i tried with 200 values) it calculates correctly. Where is the problem?
2, For that 200 values calculation, i have the maximum 'z' value of 0.07 and result shows around the edges of contour plot something around 0.25. In the center of the plot everything was correct. How to deal with this problem?
I hope you can understand my problem.
Thanks,
Babu. |
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easwar
USA
1965 Posts |
Posted - 12/15/2003 : 11:42:26 AM
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Hi Babu,
Please send your OPJ (or the data file with details on what steps you followed) to your tech support contact, so that we can take a look.
Thanks,
Easwar.
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babu
Germany
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Posted - 01/09/2004 : 09:16:18 AM
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quote:
Hi Babu,
Please send your OPJ (or the data file with details on what steps you followed) to your tech support contact, so that we can take a look.
Thanks,
Easwar.
Hallo Easwar,
I had send my data last month. But i didnt get any response till now? Have you received my data file?
Expecting your reply,
Babu. |
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easwar
USA
1965 Posts |
Posted - 01/09/2004 : 11:20:25 AM
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Hi Babu,
Please send your OPJ, associated notes, code etc. directly to tech support and not to me. And they will look at it and get back to you.
Thanks,
Easwar.
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babu
Germany
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Posted - 01/12/2004 : 12:37:30 PM
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hi easwar,
how to send my data to techsupport? is there any specific email id? help me reg this.
babu. |
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Lorraine
USA
66 Posts |
Posted - 01/12/2004 : 7:07:39 PM
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Dear Babu,
Since you are in Germany, I will give you the information for the Origin support team in your country.
They are:
Additive
Rohrwiesenstr. 2
D-61381 Friedrichsdorf/Ts Germany
Phone: +49 6172 5905 0
Fax: +49 6172 77613
E-mail: origin@additive-net.de
Web: http://www.additive-net.de/software/origin/
Please send your inquiry and your files to origin@additive-net.de. I have contacted the support team at Additive and have let them know about your inquiry here on this forum.
Thank you for your inquiry and for your interest in Origin!
Lorraine
OriginLab Technical Support |
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Topic |
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Contour plot