ggpath {ggplot} | R Documentation |
Add a path (a line between points in the order that they appear in the dataset) to the plot
ggpath(plot = .PLOT, aesthetics=list(), ..., data=NULL)
plot |
the plot object to modify |
aesthetics |
named list of aesthetic mappings, see details for more information |
... |
other options, see details for more information |
data |
data source, if not specified the plot default will be used |
Aesthetic mappings that this grob function understands:
x
:x position (required)
y
:y position (required)
id
:identifier variable used to break up into multiple paths
size
:size of the line, in mm (see scsize
)
colour
:line colour (see sccolour
)
linetype
:line style/type (see sclinetype
)
These can be specified in the plot defaults (see ggplot
) or
in the aesthetics
argument. If you want to modify the position
of the points or any axis options, you will need to add a position scale to
the plot. These functions start with ps
, eg.
pscontinuous
or pscategorical
Other options:
Hadley Wickham <h.wickham@gmail.com>
myear <- do.call(rbind, by(movies, movies$year, function(df) data.frame(year=df$year[1], mean.length = mean(df$length), mean.rating=mean(df$rating)))) p <- ggplot(myear, aesthetics=list(x=mean.length, y=mean.rating)) ggpath(p) ggpath(p, list(size=year)) ggpath(p, list(colour=year)) ggpath(scsize(p, c(0.5,1)), list(size=year)) ggpath(scsize(p, c(0.5,1)), list(size=year)) p <- ggplot(mtcars, aesthetics=list(x=drat, y=wt)) ggpath(p) ggpath(p, list(id=cyl))