function auxvar
%AUXVAR  Auxiliary variables for the parameter estimation schemes
%	MAXITER: The maximum number of iterations to be performed when search
%	ing for the minimum. Default is MAXITER=10. With MAXITER=0 only a non-
%	iterative initial value estimation procedure is carried out.
%
%	TOL: The iterations are continued until the candidate update vector
%	has a norm less than TOL. Default is TOL=0.01. The iterations are also
%	terminated when MAXITER is reached, or when the search procedure fails
%	to find a lower value of the criterion along the candidate direction.
%
%	LIM: The criterion is robustified, so that a residual that is larger
%	than LIM*(estimated standard deviation) carries a linear, rather than
%	quadratic weight. Default is LIM=1.6. LIM=0 means that a non-
%	robustified (truly quadratic) criterion is used.
%
%	MAXSIZE: No matrix with more than MAXSIZE elements is formed by the
%	algorithms. The default value is set by the .m-file idmsize. (On a
%	PC the default value is MAXSIZE = 4096). If you run into
%	memory problems	try lower values of MAXSIZE. See also HELP MEMORY.
%	T: The sampling interval. Default is T=1. T is essential to obtain
%	physical frequency scales, and when transforming to continuous time.
%
%	Omitting trailing arguments or entering them as [] gives default
