[R] plot betadisper, change of pch

[Albin Blaschka]

Hello!

After performing an analysis with betadisper, package vegan I would like 
to plot the results - so far, so good. But I would also like to "tune" a 
little bit the plotting characters, as '+' and 'x' are a little to 
similar...

My (boiled down) code:

[See session info at the bottom of the mail, vegan is vegan_2.0-3]

mod <- betadisper(mydata, mygroups, type='median')
syms <- c(rep(1:4, each = 16))
modplot <- plot(mod, axes = c(1,2), main='', pch=syms)

I get the error message (roughly translated from german):
"formal argument 'pch' fits to more given arguments"
[formales Argument "pch" passt zu mehreren gegebenen Argumenten]

What do I have to change?

Thank you in advance!
Albin

 > sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=de_AT.UTF-8       LC_NUMERIC=C 
LC_TIME=de_AT.UTF-8        LC_COLLATE=de_AT.UTF-8
  [5] LC_MONETARY=de_AT.UTF-8    LC_MESSAGES=de_AT.UTF-8    LC_PAPER=C 
                LC_NAME=C
  [9] LC_ADDRESS=C               LC_TELEPHONE=C 
LC_MEASUREMENT=de_AT.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] rgl_0.92.798      reshape_0.8.4     plyr_1.7.1        MASS_7.3-16 
     vegan_2.0-3       permute_0.7-0     RPostgreSQL_0.3-2
[8] DBI_0.2-5

loaded via a namespace (and not attached):
[1] grid_2.15.0    lattice_0.20-6 tools_2.15.0


-- 
| Albin Blaschka, Mag.rer.nat.
| Etrichstrasse 26, A-5020 Salzburg
| * www.albinblaschka.info * www.thinkanimal.info *
| - It's hard to live in the mountains, hard but not hopeless!