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spline [Mon Oct 25 23:13:33 2010] Alexander |
spline [Thu Jan 14 17:12:42 2021] Alexander |
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- | ====== Using Spline for Baseline Subtraction | + | ====== Using Spline for Baseline Subtraction ====== |
- | You can use cubic spline to fit and subtract baseline on Fit Plot. To create spline curve click on '' | + | You can use cubic spline to subtract baseline on Fit Plot. To create spline curve click on '' |
- | Don' | + | Do not use splines to subtract baselines which can be fit well enough with '' |
===== Editing Spline ===== | ===== Editing Spline ===== | ||
- | Created spline has 3 anchor points by default. You can move, add and remove anchor points: | + | Created spline has three anchor points by default. You can move, add and remove anchor points: |
* Move anchor point with mouse | * Move anchor point with mouse | ||
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* Double click on anchor point to remove it | * Double click on anchor point to remove it | ||
- | {{: | + | Set '' |
+ | |||
+ | {{: | ||
===== Fitting with Spline ===== | ===== Fitting with Spline ===== | ||
- | Spline anchor point (//x//, //y//) coordinates are treated as fit parameters so you can perform fitting with spline. Note that the anchor point coordinates will be varied but the number of point will remain. You also can lock some parameters (usually | + | Spline anchor point (//x//, //y//) coordinates are treated as fit parameters so you can perform fitting with spline |
- | It is recommended to set appropriate fit intervals which contain only baseline without peaks. In such case '' | + | It is recommended to set appropriate fit intervals which contain only baseline without peaks. In such case '' |
- | Set '' | + | {{: |
- | {{: | + | ===== See Also ===== |
+ | * [[fitting]] | ||
+ | * [[custom_fit_equation]] | ||
+ | * [[guess_peaks]] | ||
+ | * [[fit_equations]] |