Description Warning Message About Ignoring Unknown Aesthetics Examples
Add additional dimensionality to visualizations by using the color and/or
fill aesthetics to convey the values of two continuous variables each. By
projecting variable values onto YUV color space, a scale is created that
allows viewers to intuitively determine the values of both variables from the
single displayed color. Includes two new scales and a new guide for ggplot2.
See scale_color_colorplane
for usage.
Layers now produce a warning message when unrecognized aesthetics are found
but have no mechanism for notifying them of aesthetics handled by scales.
The warning can be avoided by mapping color2
/fill2
at the plot
level (i.e. in the initial ggplot()
statement). If you want to avoid
colorplane mapping on all layers, map color
/fill
only on the
layers you want, as in the example below.
1 2 3 4 5 6 | library(ggplot2)
ggplot(iris, aes(x = Sepal.Length, y = Sepal.Width,
colour2 = Petal.Width)) +
geom_point(aes(colour = Petal.Length)) +
geom_line(aes(linetype = Species)) +
scale_color_colorplane()
|
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