One-Dimensional

• Line
• Polynomial
• Gaussian peak
• Lorentzian peak
• Exponential with X offset constant
• Double Exponential with X offset constant
• Exponential
• Double Exponential
• Sin
• Hill Equation
• Sigmoid
• Power
• Lognormal

Two-Dimensional

• Gaussian
• Polynomial

All built-in nonlinear fit functions feature automatic initial guess generation.

Override automatic initial guesses with your own.

Hold any fit coefficient. For instance, hold constant term in line fit to fit a line through the origin or any other y-intercept.