motor                  package:boot                  R Documentation

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.

Usage:

     data(motor)

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.

See Also:

     'mcycle'

