errlines: Plot error bars
| errlines | R Documentation |
Plot error bars
Description
The function plots error bars to existing plot.
Usage
errlines(x, ...)
## Default S3 method:
errlines(x, y, type = "l", code = 0,
width = 0, vertical = TRUE, col = 1, bg = NA, ...)
Arguments
x |
Numeric vector with coordinates along the horizontal axis
(if |
y |
A matrix-like object with 2 columns for lower and upper values on the
vertical axis (if |
type |
Character, |
code |
Integer code, determining the kind of ticks to be drawn. See Details. |
width |
Numeric, width of the ticks (if |
vertical |
Logical, if errorbars should be plotted vertically or horizontally. |
col |
Color of the error lines to be drawn, recycled if needed. |
bg |
If |
... |
Other arguments passed to the function |
Details
The errlines function uses lines to draw error bars
to existing plot when type = "l".
polygon is used for boxes when type = "b".
If code = 0 no ticks are drawn, if code = 1, only
lower ticks are drawn, if code = 2 only
lower ticks are drawn, if code = 3 both
lower and upper ticks are drawn.
Value
Adds error bars to an existing plot as a side effect.
Returns NULL invisibly.
Author(s)
Peter Solymos
See Also
lines, polygon
Examples
x <- 1:10
a <- rnorm(10,10)
a <- a[order(a)]
b <- runif(10)
y <- cbind(a-b, a+b+rev(b))
opar <- par(mfrow=c(2, 3))
plot(x, a, ylim = range(y))
errlines(x, y)
plot(x, a, ylim = range(y))
errlines(x, y, width = 0.5, code = 1)
plot(x, a, ylim = range(y), col = 1:10)
errlines(x, y, width = 0.5, code = 3, col = 1:10)
plot(x, a, ylim = range(y))
errlines(x, y, width = 0.5, code = 2, type = "b")
plot(x, a, ylim = range(y))
errlines(x, y, width = 0.5, code = 3, type = "b")
plot(x, a, ylim = range(y), type = "n")
errlines(x, y, width = 0.5, code = 3, type = "b", bg = 1:10)
errlines(x, cbind(a-b/2, a+b/2+rev(b)/2))
points(x, a)
par(opar)
