As of Version 7.0, has become a property of NonlinearModelFit.

is a possible value for the RegressionReport option for NonlinearRegress which represents a table of curvature diagnostics.


  • To use , you first need to load the Regression Common Functions Package. You can do this by using , which will automatically load the Regression Common Functions Package, or you can load the package directly by using .
  • includes the maximum relative intrinsic curvature, the maximum relative parameter-effects curvature, and the relative curvature of the least-squares solution confidence region.
  • Diagnostics in the fit curvature table give information about the validity of other diagnostics.
  • If curvatures are high, diagnostics based on linear approximations may give poor results.
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