qqtest: Self Calibrating Quantile-Quantile Plots for Visual Testing

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Provides the function qqtest which incorporates uncertainty in its qqplot display(s) so that the user might have a better sense of the evidence against the specified distributional hypothesis. qqtest draws a quantile quantile plot for visually assessing whether the data come from a test distribution that has been defined in one of many ways. The vertical axis plots the data quantiles, the horizontal those of a test distribution. The default behaviour generates 1000 samples from the test distribution and overlays the plot with shaded pointwise interval estimates for the ordered quantiles from the test distribution. A small number of independently generated exemplar quantile plots can also be overlaid. Both the interval estimates and the exemplars provide different comparative information to assess the evidence provided by the qqplot for or against the hypothesis that the data come from the test distribution (default is normal or gaussian). Finally, a visual test of significance (a lineup plot) can also be displayed to test the null hypothesis that the data come from the test distribution.

Author
Wayne Oldford [aut, cre]
Date of publication
2016-02-25 00:32:10
Maintainer
Wayne Oldford <rwoldford@uwaterloo.ca>
License
GPL-3
Version
1.1.1

View on CRAN

Man pages

bacteria
Bacteria from Delaware River water entering the Torresdale...
dkay
'dkay' The density function of the K distribution
penicillin
31 contrast sums from a 32 run 2^(5-0) factorial experiment...
pkay
'pkay' The cumulative distribution function K distribution
primer
Automobile primer paint thickness quality control...
pullstrength
Strength of pull for 519 males aged 23-26.
qkay
'qkay' The K distribution quantile function
qqtest
'qqtest' A self-calibrated quantile-quantile plot for...
rkay
'rkay' The K distribution - generating pseudo-random values
sittingHeights
Sitting height in inches of female adults (aged 23-50).
stacklossDistances
Mahalanobis squared distances of Brownlee's stack loss plant...
WachusettReservoir
Storage, in millions of gallons daily per square mile of net...

Files in this package

qqtest
qqtest/NAMESPACE
qqtest/data
qqtest/data/bacteria.rda
qqtest/data/pullstrength.rda
qqtest/data/primer.rda
qqtest/data/sittingHeights.rda
qqtest/data/WachusettReservoir.rda
qqtest/data/stacklossDistances.rda
qqtest/data/penicillin.rda
qqtest/R
qqtest/R/stacklossDistances.R
qqtest/R/sittingHeights.R
qqtest/R/WachusettReservoir.R
qqtest/R/pullstrength.R
qqtest/R/dkay.R
qqtest/R/qkay.R
qqtest/R/pkay.R
qqtest/R/primer.R
qqtest/R/bacteria.R
qqtest/R/qqtest.R
qqtest/R/rkay.R
qqtest/R/penicillin.R
qqtest/MD5
qqtest/DESCRIPTION
qqtest/man
qqtest/man/WachusettReservoir.Rd
qqtest/man/qkay.Rd
qqtest/man/qqtest.Rd
qqtest/man/penicillin.Rd
qqtest/man/pkay.Rd
qqtest/man/sittingHeights.Rd
qqtest/man/dkay.Rd
qqtest/man/bacteria.Rd
qqtest/man/pullstrength.Rd
qqtest/man/primer.Rd
qqtest/man/stacklossDistances.Rd
qqtest/man/rkay.Rd