dslabs: rfalling_object – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

rfalling_object

Simulate falling object data

Description

The function simulates a falling object's position. Default parameters are for dropping a weight from the tower of Pisa.

Usage

rfalling_object(
  n = 14,
  d_0 = 55.86,
  v_0 = 0,
  g = -9.8,
  scale = 1,
  time = seq(0, 3.25, length.out = n),
  error_distribution = c("rnorm", "rt"),
  df = 3
)

Arguments

`n`	Sample size
`d_0`	Height from which object will fall in meters.
`v_0`	Initial velocity with which object will fall in meters per second.
`g`	Gravitational constant, 9.8 meters per second per seonnd
`scale`	The measurement errors will be multiplied by this constant.
`time`	Numeric vector of times, in seconds, at which measurements were taken.
`error_distribution`	Character. Either `rnorm` for normal or `rt` for t-distribution.
`df`	If using t-distribution, the degrees of freedom.

Value

A data.frame with the time, the distance travelled, and the observed distance.

Examples

dat <- rfalling_object()
with(dat, plot(time, observed_distance))
with(dat, lines(time, distance, col = "blue"))

dslabs

Data Science Labs

v0.7.4

Artistic-2.0

Authors

Rafael A. Irizarry, Amy Gill

Initial release