| ggerrorbar {ggplot} | R Documentation |
Add error bars to a plot
ggerrorbar(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 |
The error bar grob adds error bars to a plot. Thanks to Timm Danker for supplying some initial code and the motivation to include it in ggplot.
Aesthetic mappings that this grob function understands:
x:x position (required)
y:y position (required)
plus:length of error bar in positive direction (required)
minus:length of error bar in negative direction (defaults to -plus)
colour:line colour (see sccolour)
size:size of the line, in mm (see scsize)
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:
avoid: how should overplotting be dealt with?
"none" (default) = do nothing, "stack" = stack bars on top of one another,
"dodge" = dodge bars from side to side
Hadley Wickham <h.wickham@gmail.com>
df <- data.frame(x = factor(c(1, 1, 2, 2)), y = c(1, 5, 3, 4), g = c(1, 2, 1, 2), bar = c(0.1,
0.3, 0.3, 0.2))
df2<-df[c(1,3),];df2
p <- ggbar(ggplot(data=df, aes=list(fill=g, y=y, x=x)))
ggerrorbar(p, aes=list(plus=bar))
qplot(x,y,df,types=list("bar","errorbar"), avoid="dodge",aes=list(fill=g,plus=bar))
qplot(x,y,df,types=list("bar","errorbar"), avoid="dodge",aes=list(fill=g,plus=bar, minus=-2*bar))
qplot(x,y,df2,types=list("point","errorbar"), aes=list(plus=bar), width=0.1)
qplot(x,y,df2,types=list("bar","line","point","errorbar"), aes=list(fill=g,plus=bar,barcolour=g))
qplot(x,y,df2,types=list("jitter","errorbar"), aes=list(plus=bar))
qplot(x,y,df,types=list("point","line","errorbar"), aes=list(plus=bar,id=g), width=0.1)