Relative spinal bone mineral density measurements on 261 North
American adolescents. Each value is the difference in mineral density
taken on two consecutive visits, divided by the average. The age is
the average age over the two visits.
Usage
data("bones")
Format
General format "Format1" (see formatFuncy): A matrix of dimension 261x3.
Source
http://statweb.stanford.edu/~tibs/ElemStatLearn/
References
Hastie, Tibshirani and Friedman. The Elements of Statistical Learning (2nd edition)
(2009). Springer-Verlag. 763 pages.
Gareth M. James and Trevor J. Hastie. Functional Linear Discriminant
Analysis for Irregularly Sampled Curves. Journal of the Royal
Statistical Society Series B. 63. 533–550. 2001
Gareth M. James and Catherine A. Sugar. Clustering for Sparsely Sampled Functional Data
. Journal of the American Statistical Assocation. 98. 397–408. 2003