[R] Rearranging variables in table in non-alphabetical (manually specified) order

[Uwe Ligges]

On 08.05.2011 17:10, André Júng wrote:
> Dear all,
>
> I'm trying to rearrange variables in a table in a custum order for using it with levelplot. So far I could only find examples showing how to sort alphabetically. Here is a short example:
>
> a<- c("Anna","Anna","Michael","Klaus","Klaus","Anna","Fritz")
>
> b<- c("Schnitzel","Pommes","Pommes","Schnitzel","Wurst","Schnitzel","Schnitzel")


Hmmm, why don't you ask your supervisor about your homework? I wonder 
who your supervisor is.

Anyway, some hint:

Replace b by a factor with levels in the desired order.


> food<- matrix(c(a,b),7)
> as.data.frame(food) ->  tmp

Please replace the two lines above by something like

food <- data.frame(names=a, food=b)

beacuse 1. your matrix will destroy the factor again and is not required 
at all, and 2. never ever use "->" which makes your code almost unreadable.


Uwe Ligges



> as.data.frame(table(tmp)) ->  X
> levelplot(X$Freq ~ X$V1 * X$V2,xlab="people",ylab="food")
>
> Food is now ordered: Pommes, Schnitzel, Wurst.
> But I need: Schnitzel, Pommes, Wurst.
>
> How can I define the order? I'm happy about every suggestion.
>
> Thanks in advance!
> Andre
>
>
>
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