Gaussian
A bell-shaped peak on a constant baseline. Use it for spectral lines, detector peaks and measured distributions.
Fit the example dataStart with your own data
Example: curve.fit’s Gaussian test data, 41 points with x and y uncertainties, opened as a new copy you can edit.
Parameters
- Peak height above the baseline.
- Peak center.
- Width (standard deviation). Full width at half maximum is about 2.355σ. Reported as positive unless a requested limit requires the negative equivalent.
- Constant baseline.
Tips
- Include points on both sides of the peak and on the baseline, so the width and baseline are determined separately.
- A sloped baseline needs Gaussian on Linear Background. Long tails may fit the Lorentzian resonance curve better; compare the residuals.
- Supply δy when counts or readings have known uncertainties; curve.fit then reports reduced χ².
Related models
Guide: Fitting a Gaussian peak