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changtw
UK
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 Posted - 05/13/2004 : 08:58:06 AM
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After I plot the Spline Curve Graph, how can I access the Spline Data?
On the website, it says the spline data set is held internally, and it is possible to access it. But I just couldn't figure out how.
Many thanks! |
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easwar
USA
1965 Posts |
Posted - 05/13/2004 : 10:11:36 AM
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Hello,
Here is one way to do this:
1> Plot your data as line or line+symbol, and change line connection type to spline/bspline etc (you have already done this)
2> Add two more columns to your original data worksheet, or create a new worksheet with two columns. Set the 1st added column as type X and the second as type Y. Let me assume you created a new worksheet, and the columns are data2_a and data2_b
3> Fill data2_a with x values at which you want to find the corresponding spline/bspline y values
4> With the graph window active, go to the script window (menu: Window->Script window) and type the following command and press Enter:
data2_b=%c(data2_a)
What this command does is to use the data2_a values as X, then use the internal parameters of the spline connection, and generate new Y values for each X value using the spline parameters, and places them in data2_b
Easwar
OriginLab
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changtw
UK
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Posted - 05/13/2004 : 12:09:19 PM
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Thank you very much for your help.
Your method works great  !! |
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How to extract the spline data set?