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spline

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spline [Fri Feb 25 14:32:09 2011] Alexander |
spline [Mon Jun 3 16:47:16 2013] Alexander |
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Set ''Baseline'' checkbox in spline row in fit curves table to subtract spline from data. | Set ''Baseline'' checkbox in spline row in fit curves table to subtract spline from data. | ||

- | {{:spline1.png|Using spline for baseline fitting}} | + | {{:spline1.png?nolink|Using spline for baseline fitting}} |

===== Fitting with Spline ===== | ===== Fitting with Spline ===== | ||

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It is recommended to set appropriate fit intervals which contain only baseline without peaks. In such case ''Fit One Curve'' button is more acceptable than ''Fit by Sum'' button, because the individual interval for current curve will be used and the interval from ''Fit Interval'' tab (which is used to fit by sum of curves) is ignored. Select spline curve and set ''Edit Interval'' checkbox in the bottom of the panel to edit spline interval, then click on ''Fit One Curve'' button. The anchor point coordinates will be varied but the number of points will remain. You also can lock some parameters (usually //x// coordinates) by setting ''Lock'' checkboxes in parameters table. | It is recommended to set appropriate fit intervals which contain only baseline without peaks. In such case ''Fit One Curve'' button is more acceptable than ''Fit by Sum'' button, because the individual interval for current curve will be used and the interval from ''Fit Interval'' tab (which is used to fit by sum of curves) is ignored. Select spline curve and set ''Edit Interval'' checkbox in the bottom of the panel to edit spline interval, then click on ''Fit One Curve'' button. The anchor point coordinates will be varied but the number of points will remain. You also can lock some parameters (usually //x// coordinates) by setting ''Lock'' checkboxes in parameters table. | ||

- | {{:spline2.png|Setting Fit Interval for spline curve}} {{:spline3.png|Spline subtraction result}} | + | {{:spline2.png?nolink|Setting Fit Interval for spline curve}} {{:spline3.png?nolink|Spline subtraction result}} |

===== See Also ===== | ===== See Also ===== |

spline.txt ยท Last modified: Sun Nov 8 12:21:24 2015 (external edit)

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