Hi,
I have trouble to obtain the ordination graph I want. I want to have 4 RDA
biplot on the same page and I don't want to have (or I want to modify) the
axis numbers. I want the marks on the axis without numbers to maximize the
space for each RDA plot.

This seems like a simple task but I tried different approaches and coudn't
figure out how to change my axis. This is my code :

par(mfrow=c(2,2))
par(mar=c(0.2,0.2,0.2,0.2))

### first RDA biplot
with(arctic, levels(site))
shapevec<- c(19,19,19,19,19,19,19,19,19,19,19,19,6,6,6,6,6,6,6,6,6,6,6,6)
plot(spiders.rda.a, type = "n", scaling = 2, las=1, tcl=0.2,
col.axis="white")
with(spiders.env.a, points(spiders.rda.a, display = "sites",
                                scaling = 2, pch = shapevec, cex=1.3))
text(spiders.rda.a, display="bp", cex=1.1, col.axis="white", ann=FALSE)
#### it is when I run this line that my y axis appear on the right but I
don't want to
### in yellow, this is what I tried to make it diseappear. To put those
arguments in plot() doesn't change anything.

What should I had in the text part to make sure that the axis doesn't show
up?
My intention is to plot my sites as dots without text and my arrows for
environmental variables with the name of each variable. Any other ideas on
rda plot will be greatly appreciated.
Thank you very much :D

-- 
Sarah Loboda
MSc candidate, Entomology,
Department of Natural Resource Sciences
McGill University
*http://insectecology.mcgill.ca/*

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