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
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