Hi, I am trying to create a Cumulative Frequency graph and I am using the following example: http://www.r-tutor.com/elementary-statistics/quantitative-data/cumulative-frequency-graph When I plot this data, how do I put in "real values" on the x-axis, rather than the values that are used for the breaks Thanks -- Shane [[alternative HTML version deleted]]
Hello,
Try setting the argument xaxt (x axis type) to "n" (no x axis) and
then
use ?axis.
plot(breaks, cumfreq0, # plot the data
main="Old Faithful Eruptions", # main title
xlab="Duration minutes", # x?axis label
ylab="Cumulative eruptions", # y?axis label
xaxt = "n")
lines(breaks, cumfreq0)
axis(1, at = duration)
Hope this helps,
Rui Barradas
Em 19-03-2013 12:34, Shane Carey escreveu:> Hi,
>
> I am trying to create a Cumulative Frequency graph and I am using the
> following example:
>
http://www.r-tutor.com/elementary-statistics/quantitative-data/cumulative-frequency-graph
>
> When I plot this data, how do I put in "real values" on the
x-axis, rather
> than the values that
> are used for the breaks
>
> Thanks
>
On 03/19/2013 11:34 PM, Shane Carey wrote:> Hi, > > I am trying to create a Cumulative Frequency graph and I am using the > following example: > http://www.r-tutor.com/elementary-statistics/quantitative-data/cumulative-frequency-graph > > When I plot this data, how do I put in "real values" on the x-axis, rather > than the values that > are used for the breaks >Hi Shane, The values in the plot you use as an example are "real" in the sense that they are equal to the time values. If you want different intervals, then it makes sense to add a separate axis. For example: data(faithful) duration = faithful$eruptions breaks = seq(1.5, 5.5, by=0.5) duration.cut = cut(duration, breaks, right=FALSE) duration.freq = table(duration.cut) cumfreq0 = c(0, cumsum(duration.freq)) plot(breaks,cumfreq0, main="Old Faithful Eruptions", xlab="Duration minutes", ylab="Cumulative eruptions",xaxt="n",type="b") axis(1,at=2:5) gives more or less the plot illustrated. Jim