R: Rotate x-axis labels in a barplot

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R: Rotate x-axis labels in a barplot

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#1 by (1 votes)

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I wanted to know how to tilt (certain degrees to the right) the axis labels x of a barplot . When I run the script of barplot :

     barplot(Indexpercentage, horiz = FALSE, col = c("Green","Orange","Red","Blue"), beside = FALSE, xlim=c(0,5),ylab ="Diversity (%)", xlab="Diversity measure",font.axis=2, cex.axis = 0.8,cex.names = 0.8,font.lab=2,yaxp = c(0, 100,4))

I get this plot , from which the labels of the second and fourth columns can not be read (I suppose that they overlapped)

I would also like to know if there is any way to show the axis line x below barplot .

Thanks in advance.

r rstudio

asked by Adrián P.L. 20.12.2017 в 17:39

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1 answer

Delete rungs from a Python csv I need to return an array of objects but my code only returns the last value of the fixes

score 1 · Accepted Answer

If the problem of X-axis labels has to do with overlapping, you can do two things:

Enlarge the graphic: Simply expanding the Rstudio plot window, or clicking on the zoom button.

Show the labels vertically using the las=2 parameter together with the function axis()

Let's see an example:

counts <- table(mtcars$vs, mtcars$gear)
colnames(counts) <- c("Etiqueta 1", "Etiqueta 2", "Etiqueta 3")
barplot(counts, main="Car Distribution by Gears and VS",
        col=c("darkblue","red"),
        legend = rownames(counts))

One way is using the las=2 parameter as follows:

barplot(counts, main="Car Distribution by Gears and VS",
        col=c("darkblue","red"),
        legend = rownames(counts), las=2)

If you also want an X axis, you can use axis() :

barplot(counts, main="Car Distribution by Gears and VS",
        col=c("darkblue","red"),
        legend = rownames(counts),
        names.arg = c(NA, NA, NA),
        ) + axis(1, at=seq(1,3),labels=colnames(counts), las=2)

And if you eventually want the labels with some inclination:

x <- barplot(counts, 
        main="Car Distribution by Gears and VS",
        col=c("darkblue","red"),
        xaxt="n")

text(cex=1, x=x, y=-1.25, colnames(counts), xpd=TRUE, srt=45, pos=2)