plot.dtrace {dtrace} | R Documentation |
This function provides a plot method for
objects of class dtrace
, such as those created
by dtrace
.
## S3 method for class 'dtrace': plot(x, col = NULL, lty = 1:length(x$density), lwd = NULL, main = "", xlab = "", ylab = "Density", log = "", las = par("las"), add = FALSE, draw.legend = length(x$density) > 1 && !add, ...)
x |
An object of class dtrace . |
col |
Colors for the lines. |
lty |
Line textures (recycled if required). |
lwd |
Line widths (recycled if required). |
main |
An overall title for the plot. |
xlab |
A label for the x axis. |
ylab |
A label for the y axis. |
log |
A character string indicating which axes should be shown
on a log scale. The default is "" . |
las |
Desired axis label style. |
add |
If true, the density traces are drawn on an existing plot, otherwise a new plot is created. |
draw.legend |
Should a legend be added to the plot? |
... |
Additional arguments which are passed to legend
so that the legend can be customized. |
This function produces a plot of density trace object. The plot can show a either single density or several superimposed densities. In the latter case, a legend is printed on the plot indicating which density is which. By default, different line textures are used to distinguish the densities but it is also possible to vary colors and line thicknesses.
The plots produced by this function have minimal annotation. This is deliberate because, when several densities are superimposed, it is not clear what should be written on the plot. The density trace summary function can be used to obtain information about the density extimates which could be written onto the plot.
The value of the argument x
is returned as the invisible value
of this function.
Ross Ihaka
## Estimation and plotting of three densities. ## A demonstration of the formula-based interface. data(iris) d <- dtrace(Petal.Width ~ Species, data = iris) plot(d, lty = 1, col=c("red","green4", "blue"), legend = c("Setosa", "Versicolor", "Virginica"), main = "The Distribution of Iris Petal Width", xlab = "Petal Width (cm)")