geom_text {ggplot2} | R Documentation |
Textual annotations
geom_text(mapping=NULL, data=NULL, stat="identity", position="identity", parse=FALSE, ...)
mapping |
mapping between variables and aesthetics generated by aes |
data |
dataset used in this layer, if not specified uses plot dataset |
stat |
statistic used by this layer |
position |
position adjustment used by this layer |
parse |
If TRUE, the labels will be parsed into expressions and displayed as described in ?plotmath |
... |
other arguments |
This page describes geom_text, see layer
and qplot
for how to create a complete plot from individual components.
A layer
The following aesthetics can be used with geom_text. Aesthetics are mapped to variables in the data with the aes function: geom\_text(aes(x = var))
x
: x position (required)
y
: y position (required)
label
: text label (required)
colour
: border colour
size
: size
angle
: angle
hjust
: horizontal justification, between 0 and 1
vjust
: vertical justification, between 0 and 1
alpha
: transparency
Hadley Wickham, http://had.co.nz/
## Not run: p <- ggplot(mtcars, aes(x=wt, y=mpg, label=rownames(mtcars))) p + geom_text() p <- p + geom_point() # Set aesthetics to fixed value p + geom_text() p + geom_point() + geom_text(hjust=0, vjust=0) p + geom_point() + geom_text(angle = 45) # Add aesthetic mappings p + geom_text(aes(colour=factor(cyl))) p + geom_text(aes(colour=factor(cyl))) + scale_colour_discrete(l=40) p + geom_text(aes(size=wt)) p + geom_text(aes(size=wt)) + scale_size(to=c(3,6)) # You can display expressions by setting parse = TRUE. The # details of the display are described in ?plotmath, but note that # geom_text uses strings, not expressions. p + geom_text(aes(label = paste(wt, "^(", cyl, ")", sep = "")), parse = T) # Use qplot instead qplot(wt, mpg, data = mtcars, label = rownames(mtcars), geom=c("point", "text")) qplot(wt, mpg, data = mtcars, label = rownames(mtcars), size = wt) + geom_text(colour = "red") ## End(Not run)