# andrewsplot

From pracma v1.9.9 by HwB
0th

Percentile

##### Andrews' Curves

Plots Andrews' curves in cartesian or polar coordinates.

Keywords
graphs
##### Usage
andrewsplot(A, f, style = "pol", scaled = FALSE, npts = 101)
##### Arguments
A
numeric matrix with at least two columns.
f
factor or integer vector with nrow(A) elements.
style
character variable, only possible values cart' or pol'.
scaled
logical; if true scales each column to have mean 0 and standard deviation 1 (not yet implemented).
npts
number of points to plot.
##### Details

andrewsplot creates an Andrews plot of the multivariate data in the matrix A, assigning different colors according to the factor or integer vector f.

Andrews' plot represent each observation (row) by a periodic function over the interval [0, 2*pi]. This function for the i-th observation is defined as ...

The plot can be seen in cartesian or polar coordinates --- the latter seems appropriate as all these functions are periodic.

##### Value

Generates a plot, no return value.

##### Note

Please note that a different ordering of the columns will result in quite different functions and overall picture.

There are variants utilizing principal component scores, in order of decreasing eigenvalues.

##### References

R. Khattree and D. N. Naik (2002). Andrews PLots for Multivariate Data: Some New Suggestions and Applications. Journal of Statistical Planning and Inference, Vol. 100, No. 2, pp. 411--425.

polar, andrews::andrews

• andrewsplot
##### Examples
## Not run:
# data(iris)
# s <- sample(1:4, 4)
# A <- as.matrix(iris[, s])
# f <- as.integer(iris[, 5])
# andrewsplot(A, f, style = "pol")
# ## End(Not run)

Documentation reproduced from package pracma, version 1.9.9, License: GPL (>= 3)

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