R help - May 2011 - Rearranging variables in table in non-alphabetical (manually specified) order

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


?
___________________________________________________________
Schon geh?rt? WEB.DE hat einen genialen Phishing-Filter in die

On 11-05-08 11:10 AM, Andr? J?ng 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")
> food<- matrix(c(a,b),7)
> as.data.frame(food) ->  tmp
> 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.
>
The general answer to that question is to make b into a factor with the 
levels in a specified order, e.g. by

b <- factor(b, levels=c("Schnitzel", "Pommes",
"Wurst"))

However, this doesn't survive the other strange things you are doing. 
If you simplify the rest, it should be fine.  For example:

food <- data.frame(a,b)
X <- as.data.frame(table(food))
levelplot(Freq ~ a * b, data= X)

Duncan Murdoch

On 08.05.2011 17:10, Andr? J?ng 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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> Schon geh?rt? WEB.DE hat einen genialen Phishing-Filter in die
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