facet_wrap problem

[Meike Kern]

Hello,

I am new to ggplot2 and I can't to get my graphs to work.

I am trying to do kinda simple facet_wrap plots, plotting total dry weight oder Shell lenght and "facet_wrap" it for the different sites at which i sampled. But i always get the error message: layout_base

graph<-ggplot(data=data, aes(x=sL, y=tdw, colour=species))+geom_point(data = data,  size =3)+theme_bw()

> graph1<-graph+labs(x="shell length in (mm)" , y= "Shell dry weight")

> graph1

> graph2<-graph1+facet_wrap(Site~)

Fehler: Unerwartete(s) ')' in "graph2<-graph1+facet_wrap(Site~)"

> graph2

Fehler in layout_base(data, cols, drop = drop) : 

  At least one layer must contain all variables used for facetting

does anybody know where how i could fix this problem??

Thank you for the help

[Ista Zahn]

Hi,

The first problem is in your facet_wrap() call, which should be
facet_wrap(~Site), NOT facet_wrap(Site~). Since this returns an error,
and graph2 is not (re)assigned, I can't see how graph2 was actually
created. Start by fixing your facet_wrap() problem and see if that
fixes things.

Best,
Ista

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