SkewLaplacePlots {HyperbolicDist} | R Documentation |
qqskewlap
produces a skew-Laplace QQ plot of the
values in y
.
ppskewlap
produces a skew-Laplace PP (percent-percent) or
probability plot of the values in y
.
If line = TRUE
, a line with zero intercept and unit slope is
added to the plot.
Graphical parameters may be given as arguments to qqskewlap
, and
ppskewlap
.
qqskewlap(y, Theta, main = "Skew-Laplace Q-Q Plot", xlab = "Theoretical Quantiles", ylab = "Sample Quantiles", plot.it = TRUE, line = TRUE, ...) ppskewlap(y, Theta, main = "Skew-Laplace P-P Plot", xlab = "Uniform Quantiles", ylab = "Probability-integral-transformed Data", plot.it = TRUE, line = TRUE, ...)
y |
The data sample. |
Theta |
Parameters of the skew-Laplace distribution. |
xlab, ylab, main |
Plot labels. |
plot.it |
Logical. TRUE denotes the results should be plotted. |
line |
Logical. If TRUE, a line with zero intercept and unit slope is added to the plot. |
... |
Further graphical parameters. |
For qqskewlap
and ppskewlap
, a list with components:
x |
The x coordinates of the points that are be plotted. |
y |
The y coordinates of the points that are be plotted. |
Wilk, M. B. and Gnanadesikan, R. (1968) Probability plotting methods for the analysis of data. Biometrika. 55, 1–17.
par(mfrow=c(1,2)) y <- rskewlap(1000,c(0.5,1,2)) qqskewlap(y,c(0.5,1,2),line=FALSE) abline(0,1,col=2) ppskewlap(y,c(0.5,1,2))