mcycle
data frame has 133 rows and 2 columns.In an experiment to test crash helmets, a series of measurements of head acceleration after a simulated motorcycle crash were recorded.
data(mcycle)
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.
Venables, W.N. and Ripley, B.D. (1994) Modern Applied Statistics with S-Plus. Springer-Verlag.