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Anbazhagan Panjamani
Joined: 06 Nov 2014 Posts: 4
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Posted: Wed Dec 17, 2014 3:59 am Post subject: To fit straight line segments throughout a curve in triparte |
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Hi ,
I have a curve in a tripartite plot . I want to do least square fitting of straight line segments through that curve and want the values of points at the intersection of these straight line segments. Which option in D Plot software helps me for the same ? Kindly help |
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DPlotAdmin Site Admin
Joined: 24 Jun 2003 Posts: 2310 Location: Vicksburg, Mississippi
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Posted: Wed Dec 17, 2014 9:00 am Post subject: |
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Use Generate>Polynomial Curve Fit with order=1, then Info>Find Intersections. _________________ Visualize Your Data
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Anbazhagan Panjamani
Joined: 06 Nov 2014 Posts: 4
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Posted: Wed Feb 25, 2015 5:50 am Post subject: |
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With generate- polynomial of degree one , I can get only a straight line segment . I need to do piecewise linear fitting of the curve . I need 7 line segment with least sqare fitting through the curve. |
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DPlotAdmin Site Admin
Joined: 24 Jun 2003 Posts: 2310 Location: Vicksburg, Mississippi
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Posted: Wed Feb 25, 2015 12:38 pm Post subject: |
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The only way to do that is to use Generate>More Curve Fits and specify the extents you want to fit, seven times. This will produce seven curves. You can combine those into one "curve" with Edit>Combine Curves.
Edit: I didn't think this through. It is very unlikely that the endpoints of those line segments will match up. I can't think of a good way to do what you want. _________________ Visualize Your Data
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