From: Marc Schwartz <marc_schwartz_at_me.com>

Date: Sat, 16 Apr 2011 11:56:26 -0500

>>> Dear listserv,

*>>>
*

*>>> Here is my latest formatting problem. I would like to rotate the x-axis labels
*

*>>> by 45 degrees on a _barplot_. Apparently this is slightly different from the
*

*>>> example given in the R FAQ, which is for rotating the x-axis labels on a
*

*>>> scatterplot
*

*>>> (http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-create-rotated-axis-labels_003f).
*

*>>>
*

*>>>
*

*>>> I have adapted that code, as best I could, and here is what I have come up with
*

*>>> so far:
*

*>>>
*

*>>> x<- c(4, 1, 1, 1)
*

*>>> barplot(x, space = 0)
*

*>>> #the "space = 0" argument, above, just reflects my personal preference for
*

*>>> having no space between the bars
*

*>>> text(1:4, par("usr")[3] - 0.025, srt = 45, adj = 1, labels = c("< 750",
*

*>>> "750-1000", "1000-1250","> 1250"), xpd = TRUE, font = 2)
*

*>>>
*

*>>> The graph this generates is pretty close to what I want, but here's where I'm
*

*>>> stuck: How do I move the x-axis labels to the _center_ of each bar? Right now,
*

*>>> they line up with the right-side of each bar.
*

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Sat 16 Apr 2011 - 17:00:18 GMT

Date: Sat, 16 Apr 2011 11:56:26 -0500

On Apr 16, 2011, at 11:50 AM, Peter Ehlers wrote:

> On 2011-04-16 09:36, Sascha Vieweg wrote: >> On 11-04-16 15:04, Josh B wrote: >>

>>> Dear listserv,

>> >> Try to set the parameter: adj=.5 (see ?par). HTH, *S* >> > > That won't work (try it). > > Use > > text(1:4-0.5, ....) > > Peter Ehlers

Actually, the key is knowing that barplot() returns the bar midpoints (See the Value section of ?barplot).

Thus:

x <- c(4, 1, 1, 1)

mp <- barplot(x, space = 0)

text(mp, par("usr")[3] - 0.025, srt = 45, adj = 1,

labels = c("< 750", "750-1000", "1000-1250", "> 1250"), xpd = TRUE, font = 2)

**HTH,
**
Marc Schwartz

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Sat 16 Apr 2011 - 17:00:18 GMT

Archive maintained by Robert King, hosted by
the discipline of
statistics at the
University of Newcastle,
Australia.

Archive generated by hypermail 2.2.0, at Sat 16 Apr 2011 - 18:00:30 GMT.

*
Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help.
Please read the posting
guide before posting to the list.
*