[R] scatterplot x axis specifications

[Uwe Ligges]

On 22.05.2012 19:59, 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 and when I do
> is.factor(Day) it returns with FALSE.
>
> 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?


Yes, missing a reproducible example so that we could easily show how it 
works.

Best,
Uwe Ligges



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