[R] Rotating the x-axis labels of a barplot

[Peter Ehlers]

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