Last data update: 2014.03.03
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R: Scatter Plot with Kernel Density Estimate
Scatter Plot with Kernel Density Estimate
Description
performs a scatter of points without labels by a kernel Density Estimation in One or Two Dimensions
Usage
s.kde2d(dfxy, xax = 1, yax = 2, pch = 20, cpoint = 1, neig = NULL, cneig = 2,
xlim = NULL, ylim = NULL, grid = TRUE, addaxes = TRUE, cgrid = 1,
include.origin = TRUE, origin = c(0, 0), sub = "", csub = 1.25,
possub = "bottomleft", pixmap = NULL, contour = NULL,
area = NULL, add.plot = FALSE)
Arguments
dfxy |
a data frame with at least two coordinates
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xax |
the column number for the x-axis
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yax |
the column number for the y-axis
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pch |
if cpoint > 0, an integer specifying the symbol or the
single character to be used in plotting points
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cpoint |
a character size for plotting the points, used with
par("cex")*cpoint . If zero, no points are drawn
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neig |
a neighbouring graph
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cneig |
a size for the neighbouring graph lines used with
par("lwd")*cneig
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xlim |
the ranges to be encompassed by the x axis, if NULL, they are
computed
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ylim |
the ranges to be encompassed by the y axis, if NULL, they are
computed
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grid |
a logical value indicating whether a grid in the background
of the plot should be drawn
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addaxes |
a logical value indicating whether the axes should be plotted
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cgrid |
a character size, parameter used with par("cex")* 'cgrid' to
indicate the mesh of the grid
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include.origin |
a logical value indicating whether the point "origin"
should be belonged to the graph space
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origin |
the fixed point in the graph space, for example c(0,0) the
origin axes
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sub |
a string of characters to be inserted as legend
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csub |
a character size for the legend, used with par("cex")*csub
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possub |
a string of characters indicating the sub-title position
("topleft", "topright", "bottomleft", "bottomright")
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pixmap |
an object pixmap displayed in the map background
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contour |
a data frame with 4 columns to plot the contour of the map :
each row gives a segment (x1,y1,x2,y2)
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area |
a data frame of class 'area' to plot a set of surface units
in contour
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add.plot |
if TRUE uses the current graphics window
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Value
The matched call.
Author(s)
Daniel Chessel
Examples
# To recognize groups of points
if(!adegraphicsLoaded()) {
data(casitas)
casitas.fuz <- fuzzygenet(casitas)
casitas.pop <- as.factor(rep(c("dome", "cast", "musc", "casi"), c(24, 11, 9, 30)))
casitas.pca <- dudi.pca(casitas.fuz, scannf = FALSE, scale = FALSE)
if(requireNamespace("MASS", quiet = TRUE)) {
s.kde2d(casitas.pca$li)
s.class(casitas.pca$li, casitas.pop, cell = 0, add.p = TRUE)
}
}
Results
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