Last Update: 7/19/2018
You can perform linear fitting with X error bars; use the Analysis: Fitting: Fit Linear with X Error menu item.
To perform nonlinear curve fitting with error data, use the orthogonal distance regression (ODR) algorithm:
If your error data are in columns (designated as X Error/Y Error), you would generally choose Instrumental as your weighting method and identify the error bar column(s). If the error data are in columns designated as something other than error, you can choose Arbitrary as your weighting method.
For implicit fitting functions, select Analysis: Fitting: Nonlinear Implicit Curve Fit to open the NLFit dialog, and specify the weight (error) in the same way.
Keywords:curve fitting, nonlinear fit, x error, y error, orthogonal distance regression, ODR
Minimum Origin Version Required: 9.1 SR0