[R] Normal probability plot examples for Wikipedia (was "qqnorm with histogram?")

Charles Berry ccberry at ucsd.edu
Mon Aug 4 22:34:15 CEST 2014

Spencer Graves <spencer.graves <at> structuremonitoring.com> writes:

> Hi, Jim et al.:
>        Thanks for the reply, Jim.
>        What are your favorite examples using normal probability plots to 
> identify outliers, skewness, kurtosis, mixtures, and the need for 
> transformations in plots of raw data and residuals from model fits -- or 
> using half-normal plots with estimated parameters?

Not sure I have a *favorite*, but the so-called "Fisher's iris data" 
provide an illustration of an obvious mixture and the value of conditioning.



As a bonus, you can reference this pretty page:


where the contributions of the iris to water purification, art, and
symbolism are noted. 

Maybe a section on the iris in statistics... ;-)



More information about the R-help mailing list