# R: Data from a Simulated Motorcycle Accident

motor {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

    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`

[Package boot version 1.2-29 Index]