What Is Optimization Toolbox?

Displaying Iterative Outputlsqnonlin and lsqcurvefitThe following table describes the output headings specific to lsqnonlin andlsqcurvefit.lsqnonlin andlsqcurvefitOutputHeadingResnormResidualFirst-orderoptimalityCG-iterationsDirectionalderivativeLambdaInformation DisplayedValue of the squared 2-norm of the residual at xResidual vector of the functionCurrent violation of the optimality conditionsNumber of conjugate gradient iterations taken by thecurrent (optimization) iteration (see “PreconditionedConjugate Gradients” on page 4-7)Gradient of the function along the search directionvalue defined in “Least-Squares Optimization” onpage 3-18. (This value is displayed when you use theLevenberg-Marquardt method and omitted when youuse the Gauss-Newton method.)2-87