s.arrow {adegraphics}

2-D scatter plot with arrows

Description

This function represents a two dimensional scatter plot with arrows linking points to the origin.

Usage

s.arrow(dfxy, xax = 1, yax = 2, labels = row.names(as.data.frame(dfxy)), 
  facets = NULL, plot = TRUE, storeData = TRUE, add = FALSE, pos = -1, ...)

Arguments

dfxy

a data frame used to produce the plot

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

labels

a character vector containing labels for arrows

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 are 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)

Details

An other origin for arrows can be specified using an adegpar parameters: porigin. Graphical parameters for points and arrows are available in parrows and ppoints of adegpar.

Value

An object of class ADEg (subclass S2.arrow) or ADEgS (if add is TRUE and/or if facets or vectors for xax/yax are used).
The result is displayed if plot is TRUE.

Author(s)

Alice Julien-Laferriere, Aurelie Siberchicot [e-mail] and Stephane Dray

See Also

S2.arrow ADEg.S2

Examples

data(doubs, package = "ade4") 
dudi1 <- ade4::dudi.pca(doubs$env, scale = TRUE, scannf = FALSE, nf = 3)
dudi2 <- ade4::dudi.pca(doubs$fish, scale = TRUE, scannf = FALSE, nf = 2)
coin1 <- ade4::coinertia(dudi1, dudi2, scannf = FALSE, nf = 2)
g11 <- s.arrow(coin1$l1, plabels.cex = 0.87, plot = FALSE)
g12 <- s.arrow(coin1$c1, plabels.cex = 1, plabels.col = "red", plot = FALSE)
g1 <- superpose(g12, g11, plot = TRUE)

xy <- cbind(rnorm(50), rnorm(50))
g2 <- s.arrow(xy, plabels.cex = 0.9, plines = list(lwd = 1.5), parrows.angle = 20)
update(g2, plines = list(col = rainbow(5)))