Butter (Power Mac
or DOS):
Applies a 4th-order, zero-phase Butterworth lowpass filter and allows for subsequent downsampling of the input time series
(Updated 16-Apr-99)
Chaosgen (Power Mac
or DOS):
Generates time series data including examples from chaotic systems
Delay3D (Power Mac
or DOS):
Shows two- and three-dimensional delay protraits
Downsamp (Power Mac
or DOS):
Downsamples without reading the data set into main memory
(Updated 16-Apr-99)
L1D2 (Power Mac
or DOS):
Computes scaling information for largest Lyapunov exponent
and correlation dimension estimates
Data Sets
quiet.dat:
COP trajectory during quiet standing (10 s, 1 kHz)
forward.dat:
COP trajectory during forward lean (10 s, 1 kHz)
sway.dat:
COP trajectory during AP sway (10 s, 1 kHz)
lorenzs.dat:
phase-randomized surrogate data set from the x-coordinate time series of the Lorenz system
laser.dat:
data set for the laser experiment described in Appendix C.1 of the book
kobe.dat:
time series from the Kobe, Japan earthquake
oo-two.dat:
sound data from a person speaking the phoneme 'oo' as in the word "two"
Links
sci.nonlinear FAQ: Frequently Asked Questions for the sci.nonlinear
internet newsgroup
Lego Fractals: Tony Roberts' photos of fractals built from Lego blocks