rasterVis (version 0.40)

Formula methods: Formula methods

Description

Formula methods

Usage

"xyplot"(x, data, dirXY, maxpixels=1e5, alpha=0.05, xscale.components=xscale.raster, yscale.components=yscale.raster, par.settings=rasterTheme(),...)
"hexbinplot"(x, data, dirXY, xscale.components=xscale.raster, yscale.components=yscale.raster, par.settings=rasterTheme(),...)

Arguments

x

A formula describing the variables to be related. It may include the layer names (which are internally converted to valid ones with make.names) and the x, y variables representing the coordinates of the Raster object. Besides, if dirXY is not missing, the variable dirXY can also be included in the formula.

data

A Raster object.

dirXY

A direction as a function of the coordinates (see xyLayer).

maxpixels

A numeric, for sampleRegular.

alpha

A numeric, transparency of the points.

xscale.components, yscale.components,par.settings

Customization of lattice. See xyplot for details.

...

Additional arguments for the xyplot and hexbinplot functions.

Examples

f <- system.file("external/test.grd", package="raster")
r <- raster(f)
names(r)

xyplot(test~y, data=r, alpha=0.5)

## Not run: 
# ##Solar irradiation data from CMSAF
# ##Data available from http://www.box.net/shared/rl51y1t9sldxk54ogd44
# 
# old <- getwd()
# ##change to your folder...
# setwd('CMSAF')
# listFich <- dir(pattern='2008')
# stackSIS <- stack(listFich)SISmm <- SISmm*24 ##from irradiance (W/m2) to irradiation Wh/m2
# setwd(old)
# 
# names(SISmm) <- month.abb
# 
# ##Relation between the January & February versus July radiation for four
# ##differents longitude regions.
# xyplot(Jan+Feb~Jul|cut(x, 4), data=SISmm, auto.key=list(space='right'))
# ##Faster with hexbinplot
# hexbinplot(Jan~Jul|cut(x, 6), data=SISmm)
# ## End(Not run)