Say here is my code:
plot(data ylab="x", xlab="y", xlim=c(1, 13))
But the x-axis of the plot presented like this:
As you see, the x-axis presented from 2 to 12 by 2. However, I want it shown from 1 to 13 by 1 step, how can I realize that?
You've defined the limits for your axis; however, R is inserting the "default" values for it.
To alter them, you need to
xaxt='n'
So, let's get it done!
plot(data, ylab="x", xlab="y", xlim=c(1, 13), xaxt='n')
# Now, define a custom axis
axis(side = 1, at=1:13)
This will give you what you want.
From the documentation, axis()
:
Description
Adds an axis to the current plot, allowing the specification of the side, position, labels, and other options.
Usage
axis(side, at = NULL, labels = TRUE, tick = TRUE, line = NA, pos = NA, outer = FALSE, font = NA, lty = "solid", lwd = 1, lwd.ticks = lwd, col = NULL, col.ticks = NULL, hadj = NA, padj = NA, ...)
Some of the most used arguments are:
side
(integer) 1=below, 2=left, 3=above and 4=right. at
(vector) position of the tick marks labels
(vector) labels for the tick marks. The vector must be the same size of at
. If ommited, the values of at
will be used. FALSE
hides any labels Useful reference:
Have a look at this code: http://cran.r-project.org/doc/contrib/Lemon-kickstart/axbreak.R
You have to source that file in order to use the function:
source('http://cran.r-project.org/doc/contrib/Lemon-kickstart/axbreak.R')
axis.break(axis=1,breakpos,bgcol="white",breakcol="black", style=c("slash","zigzag"),brw=0.02)
Adapt to your liking.
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