Either a vector of three elements corresponding to point estimate,
lower limit and upper limit of the interval estimate, respectively,
or a numeric matrix or data frame with three columns representing
point estimates, lower and upper limits.
at
Position of the line on the y-axis (if
horiz=TRUE) or the x-axis (if horiz=FALSE).
d
Length of the serifs at each end of the line. Defaults to
1/60 of the axis range.
horiz
Draw the line horizontally (TRUE) or vertically (FALSE).
pch
Character to draw at the point estimate, see
points. By default this is a small solid circle, pch=16.
cex
Expansion factor for the character at the point estimate,
for. A vector can be supplied here, one for each estimate, as in pch. Useful for
meta-analysis forest plots.
lattice
Set this to TRUE to make cistrip
a lattice panel function instead of a base graphics function. panel.cistrip(x,...) is equivalent to
cistrip(x, lattice=TRUE, ...).
...
Further arguments passed to the points and
segments functions or their lattice equivalents.
For example lty,lwd to set the
style and thickness of the line.
Author(s)
Christopher Jackson <chris.jackson@mrc-bsu.cam.ac.uk>
See Also
denstrip, vwstrip, bpstrip
Examples
## One estimate
x <- c(0.1, -2, 2)
plot(0, type="n", xlim=c(-5, 5), ylim=c(-5, 5), xlab="", ylab="")
abline(h=0, lty=2, col="lightgray")
abline(v=0, lty=2, col="lightgray")
cistrip(x, at=-0.1)
cistrip(x, at=0.2, lwd=3, d=0.1)
cistrip(x, at=-4, horiz=FALSE, lwd=3, d=0.2)
## Double / triple the area of the central point, as in forest plots
cistrip(x, at=2, d=0.2, pch=22, bg="black")
cistrip(x, at=2.5, d=0.2, pch=22, bg="black", cex=sqrt(2))
cistrip(x, at=3, d=0.2, pch=22, bg="black", cex=sqrt(3))
## Several estimates
x <- rbind(c(0.1, -2, 2), c(1, -1, 2.3),
c(-0.2, -0.8, 0.4), c(-0.3, -1.2, 1.5))
plot(0, type="n", xlim=c(-5, 5), ylim=c(-5, 5), xlab="", ylab="")
cistrip(x, at=1:4)
abline(v=0, lty=2, col="lightgray")
cistrip(x, at=1:4, horiz=FALSE, lwd=3, d=0.2)
abline(h=0, lty=2, col="lightgray")