qqplot

From distrMod v2.2.2 by Peter Ruckdeschel

Methods for Function qqplot in Package `distrMod'

We generalize function qqplot from package stats to be applicable to distribution and probability model objects. In this context, qqplot produces a QQ plot of data (argument x) against a (model) distribution. Graphical parameters may be given as arguments to qqplot.

Keywords: hplot, distribution

Usage

qqplot(x, y, ...)
## S3 method for class 'ANY,UnivariateDistribution':
qqplot(x,y,
    n = length(x), withIdLine = TRUE,
    withConf = TRUE, withConf.pw  = withConf, withConf.sim = withConf,
    plot.it = TRUE, xlab = deparse(substitute(x)),ylab = deparse(substitute(y)),
    ..., width = 10, height = 5.5, withSweave = getdistrOption("withSweave"),
    mfColRow = TRUE, n.CI = n, withLab = FALSE, lab.pts = NULL, which.lbs = NULL,
    which.Order = NULL, order.traf = NULL,
    col.IdL = "red", lty.IdL = 2, lwd.IdL = 2, alpha.CI = .95,
    exact.pCI = (n

Arguments

x: data to be checked for compatibility with distribution/model y.
y: object of class "UnivariateDistribution" or of class "ProbFamily".
n: numeric; assumed sample size (by default length of x).
withIdLine: logical; shall line y = x be plotted in?
withConf: logical; shall confidence lines be plotted?
withConf.pw: logical; shall pointwise confidence lines be plotted?
withConf.sim: logical; shall simultaneous confidence lines be plotted?
plot.it: logical; shall be plotted at all (inherited from qqplot)?
xlab: x-label
ylab: y-label
...: further parameters for method qqplot with signature ANY,UnivariateDistribution or with function plot
width: width (in inches) of the graphics device opened
height: height (in inches) of the graphics device opened
withSweave: logical: if TRUE (for working with Sweave) no extra device is opened and height/width are not set
mfColRow: shall default partition in panels be used --- defaults to TRUE
n.CI: numeric; number of points to be used for confidence interval
withLab: logical; shall observation labels be plotted in?
lab.pts: character or NULL; observation labels to be used
which.lbs: integer or NULL; which observations shall be labelled
which.Order: integer or NULL; which of the ordered (remaining) observations shall be labelled
order.traf: function or NULL; an optional trafo by which the observations are ordered (as order(trafo(obs)).
col.IdL: color for the identity line
lty.IdL: line type for the identity line
lwd.IdL: line width for the identity line
alpha.CI: confidence level
exact.pCI: logical; shall pointwise CIs be determined with exact Binomial distribution?
exact.sCI: logical; shall simultaneous CIs be determined with exact Kolmogorov distribution?
nosym.pCI: logical; shall we use (shortest) asymmetric CIs?
col.pCI: color for the pointwise CI
lty.pCI: line type for the pointwise CI
lwd.pCI: line width for the pointwise CI
pch.pCI: symbol for points (for discrete mass points) in pointwise CI
cex.pCI: magnification factor for points (for discrete mass points) in pointwise CI
col.sCI: color for the simultaneous CI
lty.sCI: line type for the simultaneous CI
lwd.sCI: line width for the simultaneous CI
pch.sCI: symbol for points (for discrete mass points) in simultaneous CI
cex.sCI: magnification factor for points (for discrete mass points) in simultaneous CI
cex.pch: magnification factor for the plotted symbols
col.pch: color for the plotted symbols
cex.lbl: magnification factor for the plotted observation labels
col.lbl: color for the plotted observation labels
adj.lbl: adj parameter for the plotted observation labels
jit.fac: jittering factor used for discrete distributions
check.NotInSupport: logical; shall we check if all x-quantiles lie in support(y)?
col.NotInSupport: logical; if preceding check TRUE color of x-quantiles if not in support(y)
with.legend: logical; shall a legend be plotted?
legend.bg: background color for the legend
legend.pos: position for the legend
legend.cex: magnification factor for the legend

Details

[object Object],[object Object]

Value

As for function qqplot from package stats: a list with components
xThe x coordinates of the points that were/would be plotted
yThe corresponding quantiles of the second distribution, including NAs.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

Examples

qqplot(r(Norm(15,sqrt(30)))(40), Chisq(df=15))
qqplot(r(Norm(15,sqrt(30)))(40), NormLocationFamily())

Documentation reproduced from package distrMod, version 2.2.2, License: LGPL-3

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