t3plot: T3plot

In cwhmisc: Miscellaneous Functions for Math, Plotting, Printing, Statistics, Strings, and Tools

Description

T3 plot for a graphical check on normality together with 95%- and 99%-acceptance regions. If the black line does not cross either the 5% nor the 1% line, the input data are normal with less than 1% error.

Usage

  T3plot(x,lab=paste("T3 plot of ",deparse(substitute(x))),
  legend.pos="bottom", cex=0.6, ...)

Arguments

x	Data vector.
lab	String for heading of plot.
legend.pos, cex, ...	see legend.

Value

Is called for its side effect to produce a T3 plot.

Author(s)

Sucharita Ghosh, [e-mail],
with cosmetics by Christian W. Hoffmann, [e-mail]

References

Ghosh, S. (1996) A new graphical tool to detect non-normality. Journal of the Royal Statistical Society B , 58, 691-702.

Examples

  par(mfrow=c(2,2))
  T3plot(rnorm(100))
  T3plot(rnorm(10000))
  T3plot(rnorm(1000)+runif(1000)*0.1,"Mixture,rather well normal")
  T3plot(rnorm(1000)+runif(1000)*10,"Not < 1 percent error for normality")

cwhmisc documentation built on May 1, 2019, 7:55 p.m.