Readme file
SERIES
B
 Statistical
Methodology
J. E. Heffernan and J. A. Tawn: A conditional approach for multivariate extreme values
Journal of the Royal Statistical Society, Series B, volume 66 (2004)
Data sets: summer.txt, winter.txt
These are data sets in ASCII format with following variables:
Column1 : daily maximum ozone in parts per billion
Column2 : daily maximum NO2 in parts per billion
Column3 : daily maximum NO in parts per billion
Column4 : daily maximum SO2 in parts per billion
Column5 : daily maximum PM10 in micrograms/metre^3
Both data sets are measurements of air pollution variables recorded in
Leeds city centre (UK) from 1994-1998 inclusive. The summer data set
corresponds to observations during April - July inclusive and the
winter data set to those during November - February inclusive. The
outliers mentioned in the paper have been excluded from these data
sets.
These monitoring data have been provided by the Air Quality Archive at
www.airquality.co.uk. This and the measurement programmes are funded
by Defra, the Scottish Executive, the Welsh Assembly Government and
DoE Northern Ireland.
Janet Heffernan
Department of Mathematics and Statistics
Lancaster University
Lancaster
LA1 4XL
UK
E-mail: j.heffernan@lancaster.ac.uk
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