s.traject: 2-D scatter plot with trajectories

Description

This function represents a two dimensional scatter plot with trajectories.

Usage

s.traject(dfxy, fac = gl(1, nrow(dfxy)), order, labels = levels(fac), 
  xax = 1, yax = 2, col = NULL, facets = NULL, plot = TRUE, 
  storeData = TRUE, add = FALSE, pos = -1, ...)

Value

An object of class ADEg (subclass S2.traject) or ADEgS (if add is TRUE and/or if facets or multidimensional fac or vectors for xax/yax are used).

The result is displayed if plot is TRUE.

Arguments

dfxy: a data frame used to produce the plot
fac: a factor (or a matrix of factors) splitting the rows of dfxy
order: a vector containing the drawing order of the trajectories. A vector of length equal to factor.
labels: a vector of character strings containing the trajectories' labels
xax: an integer (or a vector) indicating which column(s) of dfxy is(are) plotted on the x-axis
yax: an integer (or a vector) indicating which column(s) of dfxy is(are) plotted on the y-axis
col: a color or a colors vector to color points, labels and lines
facets: a factor splitting the rows of dfxy so that subsets of the data are represented on different sub-graphics
plot: a logical indicating if the graphics is displayed
storeData: a logical indicating if the data should be stored in the returned object. If FALSE, only the names of the data arguments are stored
add: a logical. If TRUE, the graphic is superposed to the graphics already plotted in the current device
pos: an integer indicating the position of the environment where the data are stored, relative to the environment where the function is called. Useful only if storeData is FALSE
...: additional graphical parameters (see adegpar and trellis.par.get)

Author

Alice Julien-Laferriere, Aurelie Siberchicot aurelie.siberchicot@univ-lyon1.fr and Stephane Dray

Details

The fac factor is used to display several trajectories: each level of fac is a specific trajectory.

Examples

Run this code

rw <- function(a) {
  x <- 0
  for(i in 1:49) x <- c(x, x[length(x)] + runif(1, -1, 1))
  x
}
x1 <- unlist(lapply(1:5, rw), use.names = FALSE)
y1 <- unlist(lapply(1:5, rw), use.names = FALSE)
z1 <- gl(5, 50)
g1 <- s.traject(data.frame(x1, y1), z1, ppoints.pch = 19:23, plines.col = rainbow(5))

x2 <- unlist(lapply(1:2, rw), use.names = FALSE)
y2 <- unlist(lapply(1:2, rw), use.names = FALSE)
z2 <- gl(2, 50)
g2 <- s.traject(data.frame(x2, y2), z2, ppoints.pch = 21:20, plines.col = 1:2)

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