Place a "break" mark on an axis
Places a "break" mark on an axis on an existing plot.
axis.break(axis=1,breakpos=NULL,pos=NULL,bgcol="white",breakcol="black", style="slash",brw=0.02)
axis |
which axis to break |
breakpos |
where to place the break in user units |
pos |
position of the axis (see axis). |
bgcol |
the color of the plot background |
breakcol |
the color of the "break" marker |
style |
Either gap, slash or zigzag |
brw |
break width relative to plot width |
The pos argument is not needed unless the user has specified a different position from the default for the axis to be broken.
nil
There is some controversy about the propriety of using discontinuous coordinates for plotting, and thus axis breaks. Discontinuous coordinates allow widely separated groups of values or outliers to appear without devoting too much of the plot to empty space. The major objection seems to be that the reader will be misled by assuming continuous coordinates. The gap style that clearly separates the two sections of the plot is probably best for avoiding this.
Jim Lemon and Ben Bolker
plot(3:10, main = "Axis break test")
# put a break at the default axis and position
axis.break()
axis.break(2, 2.9, style = "zigzag")
twogrp <- c(rnorm(10) + 4, rnorm(10) + 20)
gap.plot(twogrp,gap = c(8,16), xlab = "Index", ylab = "Group values",
main = "Two separated groups with gap axis break",
col = c(rep(2, 10), rep(3, 10)), ytics = c(3, 5, 18, 20))
legend(12, 6, c("Low group", "High group"), pch = 1, col = 2:3)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.