Description Usage Arguments Details Value Author(s) References See Also Examples
Traces spherical depth contours of a multivariate data set. Supports data on the circle or on the sphere.
1 2 3 4 |
P |
The data as a vector, a matrix, a data frame or a list. |
tracepoints |
Logical; if TRUE, data points are added to the plot. |
colpoints |
A specification for the color of the data points. |
tracemed |
Logical; if TRUE, the Tukey median is added to the plot. |
maxdepth |
Logical; On the circle only; if TRUE, the maximum depth is printed on the plot. |
xlim |
Numeric vectors of length 2, giving the |
displaymed |
Logical; On the circle only; if TRUE, the median value is printed on the plot. |
title |
On the circle only, a specification for the plot title. |
ylab |
On the circle only, a specification for the y axis title. |
xlab |
On the circle only, a specification for the x axis title. |
colmed |
Color of the Tukey median on the plot. |
colarc |
On the sphere only, color of the spherical depth contours on the plot. |
sizepoints |
Size of plotted points. |
Supports data on the circle or the sphere. For data on the circle, data must be expressed in polar coordinates as a angle in radians with values between 0 and 2π. Data on the sphere can be expressed in Euclidean coordinates (n by 3 matrix) or in spherical coordinates (n by 2 matrix) where the first column contains θ and the second column φ. The type of coordinates is determined automatically based on the dimensions of the input.
plot |
A plot of Tukey spherical depth if the input data are on the circle, or the Tukey spherical depth contours if the input data are on the sphere. |
If data are on the sphere only, a list of 3 elements is also outputted.
1 |
A sorted vector giving the depths of the plotted contours. |
2 |
A list of matrices with the vertices of every contour. |
3 |
The Euclidean coordinates of the Tukey median |
Maxime Genest.
Liu, R.Y., Parelius, J.M. and Singh, K. (1999), Multivariate analysis by data depth: Descriptive statistics, graphics and inference (with discussion), Ann. Statist., 27, 783–858.
Mardia, K.V. and Jupp, E.J. (1999). Directional Statistics, Wiley.
sdepth
for calculation of the depth of a point, smed
for Tukey's spherical median.
1 2 3 4 5 6 7 8 9 10 11 12 13 | ## Plot of Tukey spherical depth for data on the circle.
set.seed(2011)
scontour(runif(30,min=0,max=2*pi))
## Tukey spherical depth contours for data
## on the shpere expressed in spherical coordinates.
scontour(cbind(runif(20,min=0,max=2*pi),runif(20,min=0,max=pi)))
## Tukey spherical depth contours for data
## on the sphere expressed in Euclidean coordinates.
x=matrix(rnorm(60),ncol=3)
x=t(apply(x,1,function(y){y/sqrt(sum(y^2))}))
scontour(x)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.