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jester17
2 Posts |
 Posted - 06/14/2010 : 3:28:03 PM
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Origin Ver. and Service Release (Select Help-->About Origin): 6.0
Operating System:Windows XP
Hello. I am trying to write labTALK code that will graph the data from my worksheet and then perform a polynomial fit. The graphing works fine, but the fitting doesn't seem to work. Here is my code:
wks.colSel(3,1);
wks.colSel(1,1);//selects the two columns I wish to graph, 1 on the x axis, 3 on the y axis.
work -p 201;//graphs selected columns on scatterplot
stat.data$=%H
stat.pr.order=2;
A=stat.pr.order;//debugging variable
type $(A);
stat.pr();
B=stat.pr.b1;//debugging variable
type $(B);
This is the first time I have ever used labVIEW, so I would just like simple suggestions on how to do the polynomial fit. The result should be that the data is graphed along with the standard red fitting line with the fitted equation displayed on the graph (the equivalent of selecting scatterplot, and then going to Analysis->Fit Polynomial.
Also, eventually I would like to import directly from excel into a worksheet. So any advice on that would be great.
Thanks
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Laurie
USA
404 Posts |
Posted - 06/23/2010 : 09:30:08 AM
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Hi,
The "stat.data$=%H" line needs to be changed to the following:
stat.data$ = %C;
%H is a system string variable that returns the name of the active window whereas %C returns the name of the active dataset (which is what you want to fit)
The following link is an example script that will help:
http://www.originlab.com/www/support/resultstech.aspx?ID=185&language=English&Version=All
Also another tip is to hold down the Ctrl+Shift keys while selecting the Analysis:Fitting Polynomial menu. Instead of the analysis running, you'll see the following output to the Script Window:
run.section(PR,FitPolynomial)
You can then open the PR.ogs file in Notepad. The file will be in the Origin program folder. Look at the code in the [FitPolynomial] section.
This is the LabTalk code that runs when the menu is selected.
OriginLab Technical Support |
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jester17
2 Posts |
Posted - 06/28/2010 : 10:51:16 PM
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Thanks, that worked.
Now I'm trying to do this for a number of excel files. So, for example, I want to iterate through: file#.xls where # is some number and run my polynomial fit on all of the data on a specific sheet within those files. How would I do this? |
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Polynomial Fitting