| axis {base} | R Documentation |
Adds an axis to the current plot, allowing the specification of the side, position, labels, and other options.
axis(side, at, labels = TRUE, ...)
side |
an integer specifying which side of the plot the axis is to be drawn on. |
at |
the points at which tick-marks are to be drawn. Non-finite
(infinite, NaN or NA) values are omitted. |
labels |
this can either be a logical value specifying whether (numerical) annotations are to be made at the tickmarks, or a vector of character strings to be placed at the tickpoints. |
... |
graphical parameters may also be passed as arguments to this function. |
The axis line is drawn from the lowest to the highest value of
at, but will be clipped at the plot region. Only ticks which
are drawn from points within the plot region (up to a tolerance for
rounding error) are plotted, but the ticks and their labels may well
extend outside the plot region.
This function is invoked for its side effect, which is to add an axis to an already existing plot. The axis is placed as follows: 1=below, 2=left, 3=above and 4=right.
plot(1:4, rnorm(4), axes=FALSE) axis(1, 1:4, LETTERS[1:4]) axis(2) box() #- to make it look "as usual" plot(1:7, rnorm(7), type = 's', xaxt='n', col = 'red') axis(1, 1:7, LETTERS[1:7], col.axis = 'blue')