On May 22, 2012, at 1:59 PM, jhartsho wrote:
I have created a scatter plot that has come out okay but I am having
trouble
with the x axis. My data consists of 4 treatments but these
treatments are
days so R keeps reading them as numeric and making my x axis
continuous.
Here is what I have so far:
plot(pair$MC~pair$Day, pch=c(19,24)[as.factor(Cookie)],
main='Paired t Test',
xlab='Days in Field',
ylab='Moisture Content (Percent)')
I have also done: as.factor(Day) to change it to 4 levels
No. This is more of a functional programming language, not an
applicative one. There are functions with side-effects but very few
that will change objects without assignment.
and when I do
is.factor(Day) it returns with FALSE.
You probably did not make the assignment..
pair$Day <- factor(pair$Day)
I'm assuming this is the reason that I get the message that my x and y
lengths differ when trying to convert my x axis using:
axis(side=1, at=c(0,15,30,45)
When I switch my numbers to words (i.e. zero, fifteen...) it only
brings up
a boxplot and I specifically want the points so I can assign
different pch
by group. Am I totally missing something here?
You may have lost me on that one.
axis(side=1, at= at=c(0,15,30,45), labels=c("one","fifteen", "thirty",
"forty-five")
One _does_ need to read the help page to learn the correct argument
names.
--
David Winsemius, MD
West Hartford, CT
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