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 1.2-27

Index]