# Plot of factorial maps with representation of point classes

`s.class.Rd`

performs the scatter diagrams with representation of point classes.

## Usage

```
s.class(dfxy, fac, wt = rep(1, length(fac)), xax = 1,
yax = 2, cstar = 1, cellipse = 1.5, axesell = TRUE,
label = levels(fac), clabel = 1, cpoint = 1, pch = 20,
col = rep(1, length(levels(fac))), xlim = NULL, ylim = NULL,
grid = TRUE, addaxes = TRUE, origin = c(0,0),
include.origin = TRUE, sub = "", csub = 1, possub = "bottomleft",
cgrid = 1, pixmap = NULL, contour = NULL, area = NULL, add.plot = FALSE)
```

## Arguments

- dfxy
a data frame containing the two columns for the axes

- fac
a factor partitioning the rows of the data frame in classes

- wt
a vector of the point weightings of the data frame used for computing the means (star centers) and the ellipses of dispersion

- xax
the column number of x in

`dfxy`

- yax
the column number of y in

`dfxy`

- cstar
a number between 0 and 1 which defines the length of the star size

- cellipse
a positive coefficient for the inertia ellipse size

- axesell
a logical value indicating whether the ellipse axes should be drawn

- label
a vector of strings of characters for the point labels

- clabel
if not NULL, a character size for the labels, used with

`par("cex")*clabel`

- cpoint
a character size for plotting the points, used with

`par("cex")*cpoint`

. If zero, no points are drawn- pch
if

`cpoint`

> 0, an integer specifying the symbol or the single character to be used in plotting points- col
a vector of colors used to draw each class in a different color

- xlim
the ranges to be encompassed by the x, if NULL they are computed

- ylim
the ranges to be encompassed by the y, if NULL they are computed

- grid
a logical value indicating whether a grid in the background of the plot should be drawn

- addaxes
a logical value indicating whether the axes should be plotted

- origin
the fixed point in the graph space, for example c(0,0) the origin axes

- include.origin
a logical value indicating whether the point "origin" should be belonged to the graph space

- sub
a string of characters to be inserted as legend

- csub
a character size for the legend, used with

`par("cex")*csub`

- possub
a string of characters indicating the sub-title position ("topleft", "topright", "bottomleft", "bottomright")

- cgrid
a character size, parameter used with par("cex")*

`cgrid`

to indicate the mesh of the grid- pixmap
an object 'pixmap' displayed in the map background

- contour
a data frame with 4 columns to plot the contour of the map : each row gives a segment (x1,y1,x2,y2)

- area
a data frame of class 'area' to plot a set of surface units in contour

- add.plot
if TRUE uses the current graphics window

## Examples

```
if(!adegraphicsLoaded()) {
xy <- cbind.data.frame(x = runif(200, -1, 1), y = runif(200, -1, 1))
posi <- factor(xy$x > 0) : factor(xy$y > 0)
coul <- c("black", "red", "green", "blue")
par(mfrow = c(2, 2))
s.class(xy, posi, cpoi = 2)
s.class(xy, posi, cell = 0, cstar = 0.5)
s.class(xy, posi, cell = 2, axesell = FALSE, csta = 0, col = coul)
s.chull(xy, posi, cpoi = 1)
par(mfrow = c(1, 1))
if (FALSE) { # \dontrun{
data(banque)
dudi1 <- dudi.acm(banque, scannf = FALSE)
coul = rainbow(length(levels(banque[, 20])))
par(mfrow = c(2, 2))
s.label(dudi1$li, sub = "Factorial map from ACM", csub = 1.5,
possub = "topleft")
s.class(dudi1$li, banque[, 20], sub = names(banque)[20],
possub = "bottomright", cell = 0, cstar = 0.5, cgrid = 0, csub = 1.5)
s.class(dudi1$li, banque[, 20], csta = 0, cell = 2, cgrid = 0,
clab = 1.5)
s.class(dudi1$li, banque[, 20], sub = names(banque)[20],
possub = "topright", cgrid = 0, col = coul)
par(mfrow = c(1, 1))
par(mfrow = n2mfrow(ncol(banque)))
for(i in 1:(ncol(banque)))
s.class(dudi1$li, banque[, i], clab = 1.5, sub = names(banque)[i],
csub = 2, possub = "topleft", cgrid = 0, csta = 0, cpoi = 0)
s.label(dudi1$li, clab = 0, sub = "Common background")
par(mfrow = c(1, 1))
} # }
}
```