str(species.factor)
Factor w/ 81 levels "Acer_platanoides_Bl",..: 12 12 55 55 76 76 52 52 67 67 ...

str(minmax)
int [1:162] 6163779 7262127 6163779 7422941 6163779 6644861 6163779 6644861 6163779 7262127 ...

That is, my factor is the species listed two times each
Acer_platanoides_Bl Acer_platanoides_Bl Sorbus_aucuparia_Bl Sorbus_aucuparia_Bl..... more species

and minmax lists min_sp1 max_sp1 min_sp2 min_sp2......

Here an image of my plot (with more elements included, but you can see the black squares in the centers of each box...)

http://img51.imageshack.us/img51/9011/plott.jpg

Jonas


2010-10-20 17:14, David Winsemius skrev:
On Oct 20, 2010, at 10:45 AM, fugelpitch wrote:

I have a factor which is species and the variables are a few sites where this
species live.

When I plot:

plot(species.factor, minlatitudemaxlatitude)

the plot produced is automatically a boxplot which shows the range of the
species (which is what I want).

This fact (a boxplot from the "plot" function) suggests that the objects you are plot()-ting are of some class for which there is a specific plot method. What do these commands return:

str(species.factor)
str(minlatitudemaxlatitude)     # ?


However, in the thin box which is produced by each species, there is a small black square in "center position" of the box. Is it possible to remove this.
Have tried to include bxp(par(medpch=NA)) without success.

Thanks!

Jonas Josefsson

David Winsemius, MD
West Hartford, CT

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