Thank you!  This worked beautifully.  Can you help me adapt the code to do
the same thing for a plot of means? The application is not a simple as I
hoped...

plotMeans(rich.small$ALL, rich.small$sample, error.bars="se")


On Mon, Sep 23, 2013 at 10:41 PM, Jim Lemon <jim@bitwrit.com.au> wrote:

> On 09/24/2013 10:05 AM, Sagan Friant wrote:
>
>> Dear R community,
>>
>> Please help.  I am new(ish) to R and have spent too many hours trying to
>> achieve what I believe should be a relatively simple task.  I have
>> searched
>> help forums, but have not been able to successfully apply responses to
>> loosely related questions to my own.
>>
>> I am running some preliminary summary statistics.  I wish to create a
>> boxplot graph that represents summaries of samples collected over a series
>> of time points (0-18).  My sample collection intensity was highest early
>> on, with samples collection decreasing in frequency over time.  I am
>> trying
>> to scale the the x-axis to unequal intervals.
>>
>> The code I used for a graph representing a subset of my sample (re-named)
>> is below:
>>
>> Boxplot(ALL~sample, data=rich.small, id.method="n", las = 2, names =
>> c("0","2","4","7","10","18"))
>>
>> There were 10days between samples 0&2 and 3 days between 2&4, 4&7, 7&10,
>> and then 75days between 10&18
>>
>>  Hi Sagan,
> I think what you want is to have the boxplots spaced out as the occasions
> of measurement:
>
> rich.small<-data.frame(ALL=**rnorm(240,5),
>  sample=c(rep(0,60),rep(2,50),**rep(4,40),
>  rep(7,30),rep(10,30),rep(18,**30)))
> # this gives you the spacing with the occasion labels
> boxplot(ALL~sample,rich.small,**at=c(0,10,13,16,19,94),xaxt="**n",
>  xlab="Occasion")
> library(plotrix)
> staxlab(1,at=c(0,10,13,16,19,**94),labels=c(0,2,4,7,10,18))
> # and this gives you the days
> boxplot(ALL~sample,rich.small,**at=c(0,10,13,16,19,94),xaxt="**n",
>  xlab="Days")
> staxlab(1,at=c(0,10,13,16,19,**94))
>
> Lots of space in the middle for something.
>
> Jim
>



-- 
Sagan C. Friant, MSc
Environment & Resources Ph.D Program
Nelson Institute of Environmental Studies
University of Wisconsin - Madison

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