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.

Value

Generates a plot, no return value.

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.

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.