s.image {ade4} | R Documentation |
performs a scatterplot
s.image(dfxy, z, xax = 1, yax = 2, span = 0.5, xlim = NULL, ylim = NULL, kgrid = 2, scale = TRUE, grid = FALSE, addaxes = FALSE, cgrid = 0, include.origin = FALSE, origin = c(0, 0), sub = "", csub = 1, possub = "topleft", neig = NULL, cneig = 1, image.plot = TRUE, contour.plot = TRUE, pixmap = NULL, contour = NULL, area = NULL, add.plot = FALSE)
dfxy |
a data frame containing the two columns for the axes |
z |
a vector of values on the dfxy rows |
xax |
the column number of x in dfxy |
yax |
the column number of y in dfxy |
span |
the parameter alpha which controls the degree of smoothing |
xlim |
the ranges to be encompassed by the x-axis, if NULL they are computed |
ylim |
the ranges to be encompassed by the y-axis, if NULL they are computed |
kgrid |
a number of points used to locally estimate the level line through the nodes of the grid,
used by kgrid*sqrt(length(z)) |
scale |
if TRUE, data are centered and reduced |
grid |
if TRUE, the background grid is traced |
addaxes |
a logical value indicating whether the axes should be plotted |
cgrid |
a character size, parameter used with par("cex")* cgrid to indicate the mesh of the grid |
include.origin |
a logical value indicating whether the point "origin" should be belonged to the graph space |
origin |
the fixed point in the graph space, for example c(0,0) the origin axes |
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") |
neig |
an object of class neig |
cneig |
a size for the neighbouring graph lines used with par("lwd")*cneig |
image.plot |
if TRUE, the image is traced |
contour.plot |
if TRUE, the contour lines are plotted |
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 |
Daniel Chessel chessel@biomserv.univ-lyon1.fr
if (require(splancs, quiet = TRUE)){ wxy=data.frame(expand.grid(-3:3,-3:3)) names(wxy)=c("x","y") z=(1/sqrt(2))*exp(-(wxy$x^2+wxy$y^2)/2) par(mfrow=c(2,2)) s.value(wxy,z) s.image(wxy,z) s.image(wxy,z,kgrid=5) s.image(wxy,z,kgrid=15) } ## Not run: data(t3012) if (require(splancs, quiet = TRUE)){ par(mfrow = c(4,4)) for(k in 1:12) s.image(t3012$xy,scalewt(t3012$temp[,k]), kgrid = 3) par(mfrow = c(1,1)) } data(elec88) if (require(splancs, quiet = TRUE)){ par(mfrow = c(4,4)) for(k in 1:12) s.image(t3012$xy, scalewt(t3012$temp[,k]), kgrid = 3, sub = names(t3012$temp)[k], csub = 3, area = elec88$area) par(mfrow = c(1,1)) } ## End(Not run)