This is the default panel function for parallel.
panel.parallel(x, y, z, subscripts,
groups = NULL,
col, lwd, lty, alpha,
common.scale = FALSE,
lower,
upper,
…,
horizontal.axis = TRUE,
identifier = "parallel")dummy variables, ignored.
The data frame used for the plot. Each column will be coerced to numeric before being plotted, and an error will be issued if this fails.
The indices of the rows of z that are to be displyed in this
panel.
An optional grouping variable. If specified, different groups are
distinguished by use of different graphical parameters (i.e., rows
of z in the same group share parameters).
graphical parameters (defaults to the settings for
superpose.line). If groups is non-null, these
parameters used one for each group. Otherwise, they are recycled
and used to distinguish between rows of the data frame z.
logical, whether a common scale should be used columns of z.
Defaults to FALSE, in which case the horizontal range for
each column is different (as determined by lower and
upper).
numeric vectors replicated to be as long as the number of columns in
z. Determines the lower and upper bounds to be used for
scaling the corresponding columns of z after coercing them to
numeric. Defaults to the minimum and maximum of each column.
Alternatively, these could be functions (to be applied on each
column) that return a scalar.
other arguments (ignored)
logical indicating whether the parallel axes should
be laid out horizontally (TRUE) or vertically (FALSE).
A character string that is prepended to the names of grobs that are created by this panel function.
Produces parallel coordinate plots, which are easier to
understand from an example than through a verbal description. See
example for parallel
Inselberg, Alfred (2009) Parallel Coordinates: Visual Multidimensional Geometry and Its Applications, Springer. ISBN: 978-0-387-21507-5.
Inselberg, A. (1985) “The Plane with Parallel Coordinates”, The Visual Computer.