anm.ci: Animation demonstrations of confidence intervals.

In asbio: A Collection of Statistical Tools for Biologists

Animation demonstrations of confidence intervals.

Description

Provides animated depictions of confidence intervals for \mu, \sigma^{2}, the population median, and the binomial parameter \pi.

Usage

anm.ci(parent=expression(rnorm(n)), par.val, conf = 0.95, sigma = NULL, 
  par.type = c("mu", "median", "sigma.sq", "p"), n.est = 100, 
  n = 50, err.col = 2, par.col = 4, interval = 0.1, ...) 

anm.ci.tck()

Arguments

parent	A parental distribution; ideally a distribution with known parameters.
par.val	True parameter value which is being estimated.
conf	Confidence level: 1-P(type I error).
sigma	\sigma from the normal pdf, if known.
par.type	The parameter whose confidence intervals to be estimated. There are currently four choices c("mu", "median", "sigma.sq", "p"). These are the normal pdf parameters \mu and \sigma^{2}, the population median, and the binomial parameter, \pi.
n.est	The number of confidence intervals to be created.
n	The sample size used for each confidence interval.
err.col	The line color of the intervals which do not include the true value.
par.col	The line color denoting the parameter value.
interval	The time interval for animation (in seconds). Smaller intervals speed up animation
...	Additional arguments to plot.

Details

Provides an animated plot showing confidence intervals with respect to a known parameter. Intervals which do not contain the parameter are emphasized with different colors. Loading package tcltk allows use of function anm.ci.tck which provides an interactive GUI to run the function.

Value

Returns an animated plot.

Author(s)

Ken Aho

See Also

Additional documentation for methods provided in: ci.mu.t, ci.mu.z, ci.median, ci.sigma, and ci.p.

Examples

## Not run: 
parent<-rnorm(100000)
anm.ci(parent, par.val=0, conf =.95, sigma =1, par.type="mu")
anm.ci(parent, par.val=1, conf =.95, par.type="sigma.sq")
anm.ci(parent, par.val=0, conf =.95, par.type="median")
parent<-rbinom(100000,1,p=.65)
anm.ci(parent, par.val=0.65, conf =.95, par.type="p")
##Interactive GUI, requires package 'tcltk'
anm.ci.tck()

## End(Not run)

asbio documentation built on May 29, 2024, 5:57 a.m.