Readme file
SERIES
B
 Statistical
Methodology
M. Jansen: Multiscale Poisson data smoothing
Journal of the Royal Statistical Society, Series B, volume
68 (2006), part 1, pages 27-48
The file hits20031205 contains the observations that are used as an illustration
in the paper.
The data consist of 355 weekly observations of the total number of hits
between Sunday morning 12.00 a.m. and Saturday night 11.59 p.m. on a web
domain (i.e. a set of mutually linked web sites, some of which have been
created during the experiment).
The series starts on Sunday, February 2nd, 1997, and ends on Saturday,
November 22nd, 2003. This period of time saw the rise of popularity of the
internet. As explained in the paper, some of the sudden changes in the weekly
number of hits cannot be explained by the launch of new subsites on the
web domain.
The algorithms that are used to generate the smoothed version of the observations
can be downloaded as a subset of the Matlab routines called PiefLab, which
is on the web site
http://www.cs.kuleuven.be/~maarten/software/pieflab.html
This web site has instructions on how to install the package.
Once this package has been installed, start Matlab, and type help PiefLab/Poisson
and help PiefLab/Poisson/PoissonTests for more information on the routines
used for this paper.
The software package also contains a Matlab routine, called hits20031205.m,
that generates exactly the same data set.
For more information, please contact:
Maarten Jansen
Department of Mathematics and Computer Science
Technical University of Eindhoven
HG 9.25
PO Box 513
NL 5600 MB Eindhoven
The Netherlands
E-mail: mjansen@win.tue.nl
- Dataset (hits20031205.m,
size - 2kb)
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