A wiggle is essentially a square wave whose amplitude and duration you can control.
A wiggle has a duration and an amplitude, both of which can be independently changing. Here's an example of a wiggle segment definition:
w0 wiggle # identifier, type
20 40 10 0.5 # duration: initial, max, min, increment
1000 20000 -10000 500 # amplitude: initial, max, min, increment
Here are some plots of a state with three segments, and each segment is a wiggle. The three plots are a few hundred iterations apart in time (i.e., they are not sequential iterations).
![\includegraphics [width=1.75in]{graphics/wig350.eps}](img6.gif)