A variable indication estimator which determines an output value representative
of a set of input data. For example, the estimator can reduce input data to estimates
of a desired signal, select a time, and determine an output value from the estimates
and the time. In one embodiment, the time is selected using one or more adjustable
signal confidence parameters determine where along the estimates the output value
will be computed. By varying the parameters, the characteristics of the output
value are variable. For example, when input signal confidence is low, the parameters
are adjusted so that the output value is a smoothed representation of the input
signal. When input signal confidence is high, the parameters are adjusted so that
the output value has a faster and more accurate response to the input signal.