Iterative Display

You obtain details of the steps solvers take by setting the Display option to 'iter' with optimset. The displayed output contains headings and items from the following list.

HeadingInformation DisplayedSolvers

Iteration

Iteration number, meaning the number of steps the algorithm has taken

fminsearch

Func-count

Cumulative number of function evaluations

fminbnd, fminsearch, fzero

x

Current point

fminbnd, fzero

f(x)

Current objective function value

fminbnd, fzero

min f(x)

Smallest objective function value found

fminsearch

Procedure

Algorithm used during the iteration

  • initial

  • golden (golden section search)

  • parabolic (parabolic interpolation)

fminbnd

  • initial simplex

  • expand

  • reflect

  • shrink

  • contract inside

  • contract outside

For details, see fminsearch Algorithm.

fminsearch

  • initial (initial point)

  • search (search for an interval containing a zero)

  • bisection

  • interpolation (linear interpolation or inverse quadratic interpolation)

fzero

a, f(a), b, f(b)

Search points and their function values while looking for an interval with function values of opposite signs

fzero

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