Thank you Ahmadou,

I got an error when I change fill to colour:

 > p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() +
+  scale_size(to = c(3, 15), name = "Número de especies", breaks = c(10, 
40, 70, 100, 130, 160, 190, 220, 250)) +
+  scale_colour_gradientn(name = 'Número de especies', colours = 
heat.colors(9), breaks = c(10, 40, 70, 100, 130, 160, 190, 220, 250)) + 
xlab("Longitud") + ylab("Latitud") +
+  opts(axis.text.x = theme_text(size = 8, vjust = 1)) + 
opts(axis.text.y = theme_text(size = 8, hjust = 1)) +
+  geom_path(aes(x=long,y=lat,group=group, 
colour=id),data=fortify.ai_biotica)
Error: Non-continuous variable supplied to scale_colour_gradientn.

Best,

Manuel

On 04/04/2011 03:37 a.m., ahmadou dicko wrote:
> Hi all
> Just as Pierre pointed out, i used rgeos instead of gpclib (the 
> licence is less restrictive even though i'm still students). A since 
> the last release the rgeos package seems to work well.
> I'm really disapointed by the fact that some packages (e.g 
> adehabitatMA which is great thank's M. Calenge) still use gpclib and 
> don't  offer the possibility to switch to rgeos, and is really messy 
> to have two package to do the same task and with the same function 
> name in the path (eg when  i use adehabitatMA and maptools).
>
> Manuel:
> May be you should use the *colour* aesthetic instead of**the*fill 
> *one**in the call of *geom_path*. Something like that :
>
> p = ggplot(geo, aes(x, y))
> p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + 
> scale_size(name = "Número de especies", breaks = c(2, 4, 6, 8, 10, 12, 
> 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número de especies', 
> colours = heat.colors(10), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 
> 20))+ xlab("Longitud") + ylab("Latitud") + opts(axis.text.x = 
> theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size 
> = 8, hjust = 1)) + geom_path(aes(x=long,y=lat, group=group, 
> *colour=id*),data=fortify.ai_biotica)
>
> not tested, so i'm not really sure about this one
>
> 2011/4/4 Pierre Roudier <pierre.roudier@gmail.com 
> <mailto:pierre.roudier@gmail.com>>
>
>     Hi all,
>
>     2011/4/4 Felipe Carrillo <mazatlanmexico@yahoo.com
>     <mailto:mazatlanmexico@yahoo.com>>:
>     > Manuel:
>     > As far as I know one needs gpclibPermit() in order to fortify
>     > see this:
>     > Note: polygon geometry computations in maptools
>     >         depend on the package gpclib, which has a
>     >         restricted licence. It is disabled by default;
>     >         to enable gpclib, type gpclibPermit()
>     > I am going to guess that ahmadou dicko doesn't show
>     gpclibPermit() on his
>     > code
>     > because he loaded it with Rprofile or some other way. I tried to
>     run his
>     > code without
>     > gpclibPermit() and it wouldn't let me fortify, so not sure how
>     he did it.
>
>     On that specific point, Colin Arundel and Roger Bivant released the
>     rgeos package on CRAN a few days [1]. This is a great achievement as
>     it brings bindings to the GEOS C++ lib [2] - long story short, it
>     makes the job the non-free [3] gpclib used to do.
>
>     In its later release, maptools has an option to check if rgeos if
>     present - if it is the case it is used instead of gpclib:
>
>     > library(maptools)
>     Loading required package: foreign
>     Loading required package: sp
>     Loading required package: lattice
>
>            Note: polygon geometry computations in maptools
>            depend on the package gpclib, which has a
>            restricted licence. It is disabled by default;
>            to enable gpclib, type gpclibPermit()
>
>     Checking rgeos availability as gpclib substitute:
>     TRUE
>     > ?gpclibPermit
>
>     Pierre
>
>     [1] http://cran.r-project.org/web/packages/rgeos/
>     [2] http://trac.osgeo.org/geos/
>     [3] https://stat.ethz.ch/pipermail/r-sig-geo/2010-January/007400.html
>     --
>     Scientist
>     Landcare Research, New Zealand
>
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-- 
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola@una.ac.cr
mspinola10@gmail.com
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