I am trying to get the x axis labels to be rotated 45 degrees on a barplot with no luck. This is the code I have below:
barplot(((data1[,1] - average)/average) * 100,
srt = 45,
adj = 1,
xpd = TRUE,
names.arg = data1[,2],
col = c("#3CA0D0"),
main = "Best Lift Time to Vertical Drop Ratios of North American Resorts",
ylab = "Normalized Difference",
yaxt = 'n',
cex.names = 0.65,
cex.lab = 0.65)
This question is related to
r
graph
plot
bar-chart
axis-labels
In the documentation of Bar Plots we can read about the additional parameters (...
) which can be passed to the function call:
... arguments to be passed to/from other methods. For the default method these can
include further arguments (such as axes, asp and main) and graphical
parameters (see par) which are passed to plot.window(), title() and axis.
In the documentation of graphical parameters (documentation of par
) we can see:
las
numeric in {0,1,2,3}; the style of axis labels.
0:
always parallel to the axis [default],
1:
always horizontal,
2:
always perpendicular to the axis,
3:
always vertical.
Also supported by mtext. Note that string/character rotation via argument srt to par does not affect the axis labels.
That is why passing las=2
is the right answer.
Rotate the x axis labels with angle equal or smaller than 90 degrees using base graphics. Code adapted from the R FAQ:
par(mar = c(7, 4, 2, 2) + 0.2) #add room for the rotated labels
#use mtcars dataset to produce a barplot with qsec colum information
mtcars = mtcars[with(mtcars, order(-qsec)), ] #order mtcars data set by column "qsec"
end_point = 0.5 + nrow(mtcars) + nrow(mtcars) - 1 #this is the line which does the trick (together with barplot "space = 1" parameter)
barplot(mtcars$qsec, col = "grey50",
main = "",
ylab = "mtcars - qsec", ylim = c(0,5 + max(mtcars$qsec)),
xlab = "",
space = 1)
#rotate 60 degrees (srt = 60)
text(seq(1.5, end_point, by = 2), par("usr")[3]-0.25,
srt = 60, adj = 1, xpd = TRUE,
labels = paste(rownames(mtcars)), cex = 0.65)
Andre Silva's answer works great for me, with one caveat in the "barplot" line:
barplot(mtcars$qsec, col="grey50",
main="",
ylab="mtcars - qsec", ylim=c(0,5+max(mtcars$qsec)),
xlab = "",
xaxt = "n",
space=1)
Notice the "xaxt" argument. Without it, the labels are drawn twice, the first time without the 60 degree rotation.
You may use
par(las=2) # make label text perpendicular to axis
It is written here: http://www.statmethods.net/graphs/bar.html
use optional parameter las=2 .
barplot(mytable,main="Car makes",ylab="Freqency",xlab="make",las=2)
You can use ggplot2 to rotate the x-axis label adding an additional layer
theme(axis.text.x = element_text(angle = 90, hjust = 1))
You can simply pass your data frame into the following function:
rotate_x <- function(data, column_to_plot, labels_vec, rot_angle) {
plt <- barplot(data[[column_to_plot]], col='steelblue', xaxt="n")
text(plt, par("usr")[3], labels = labels_vec, srt = rot_angle, adj = c(1.1,1.1), xpd = TRUE, cex=0.6)
}
Usage:
rotate_x(mtcars, 'mpg', row.names(mtcars), 45)
You can change the rotation angle of the labels as needed.
Source: Stackoverflow.com