Call user-defined output function.
An optimization object.
The current state of the algorithm: either 'init', 'iter', or 'done'.
A list containing at least the following elements:
data list argument may contain more levels than those presented
above. These additional levels may contain values which are specific to the
specialized algorithm, such as the simplex in a Nelder-Mead method, the
gradient of the cost function in a BFGS method, etc...
Do not return any data, but execute the output function defined in the
outputcommand element of
Author of Scilab optimbase module: Michael Baudin (INRIA - Digiteo)
Author of R adaptation: Sebastien Bihorel (firstname.lastname@example.org)