motor:
Data from a Simulated Motorcycle Accident
Description
The motor data frame has 94 rows and 4 columns. The rows are
obtained by removing replicate values of time from the dataset
mcycle. Two extra columns are added to allow for strata with
a different residual variance in each stratum.
Format
This data frame contains the following columns:
times-
The time in milliseconds since impact.
accel-
The recorded head acceleration (in g).
strata-
A numeric column indicating to which of the three strata (numbered 1, 2 and 3)
the observations belong.
v-
An estimate of the residual variance for the observation.
v is constant
within the strata but a different
estimate is used for each of the three strata.
Source
The data were obtained from Silverman, B.W. (1985) Some aspects of the spline smoothing approach to
non-parametric curve fitting.
Journal of the Royal Statistical Society, B, 47, 1--52.References
Davison, A.C. and Hinkley, D.V. (1997)
Bootstrap Methods and Their Application. Cambridge University Press.
Venables, W.N. and Ripley, B.D. (1994)
Modern Applied Statistics with S-Plus. Springer-Verlag.