Changing Axis Values in R Plot

March 15, 2013

(This article was first published on Daniel MarcelinoDaniel Marcelino » R, and kindly contributed to R-bloggers)

A colleague asked me for how one can change axis attributes in a basic plot. Plotting anything in R is really, really easy. It is enough typing plot(x, y). In general, plot functions are nicely pre-cooked, so hardly one needs to change anything. But if changes in the default attributes are needed, it is possible to achieve by including extra information to the basic syntax, like as: plot(x, y, yaxs = "i"). Actually, we can change everything in the basic chart. To see how, just take a time yourself and type: ?plot, then you can unfold several specific topics as: ?axis etc. You will see how wealthy are the resources available.

In the plot below, I plotted 6 scatterplots in only one object specially to show the chart manipulation. In the first scatterplot: top-left-hand I show the result of a default plot. In the middle plot of the same row, there is a version without the two axes. I setup this by passing the argument: axis=FALSE in the command line. The third plot, in the top-right-hand, I added the x-axis just as it is. That is, without any manipulation of the numerical scale. In the fouth plot at bottom-left-hand, I added the y-axis to the plot, but still without manipulation. Finally, in the middle plot in the same second row, I added a y-axis where I manipulated not only the sacle by setting up my own “yticks” values, but also the colour and the position of the numbers in the axis. In the last plot, I also manipulated the scale of the x-axis to range from 0 to 3 by .5. The syntax of this example is shown bellow the chart.


To leave a comment for the author, please follow the link and comment on their blog: Daniel MarcelinoDaniel Marcelino » R. offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers


Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)