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)