R help - Aug 2007 - plot table with sapply - labeling problems

Hi List,

I am trying to label a barplot group with variable names when using
sapply unsucessfully.
I can't seem to extract the names for the indiviual plots:

test<-as.data.frame(cbind(round(runif(50,0,5)),round(runif(50,0,3)),roun
d(runif(50,0,4))))
sapply(test, table)->vardist
sapply(test, function(x) round(table(x)/sum(table(x))*100,1) )->vardist1
       par(mfrow=c(1,3))
         sapply(vardist1, function(x) barplot(x,
ylim=c(0,100),main="Varset1",xlab=names(x)))
       par(mfrow=c(1,1))
  
Names don't show up although names(vardist) works.

Also I would like to put a single Title on this plot instead of
repeating "Varset" three times.

Any hints appreciated.

Thanx
Herry

Here is a modified script that should work.  In many cases where you
want the names of the element of the list you are processing, you
should work with the names:

test<-as.data.frame(cbind(round(runif(50,0,5)),round(runif(50,0,3)),round(runif(50,0,4))))
sapply(test, table)->vardist
sapply(test, function(x) round(table(x)/sum(table(x))*100,1) )->vardist1
      par(mfrow=c(1,3))
# you need to use the 'names' and then index into the variable
# your original 'x' did not have a names associated with it
sapply(names(vardist1), function(x) barplot(vardist1[[x]],
ylim=c(0,100),main="Varset1",xlab=x))
      par(mfrow=c(1,1))



On 8/9/07, Alexander.Herr at csiro.au <Alexander.Herr at csiro.au>
wrote:
> Hi List,
>
> I am trying to label a barplot group with variable names when using
> sapply unsucessfully.
> I can't seem to extract the names for the indiviual plots:
>
> test<-as.data.frame(cbind(round(runif(50,0,5)),round(runif(50,0,3)),roun
> d(runif(50,0,4))))
> sapply(test, table)->vardist
> sapply(test, function(x) round(table(x)/sum(table(x))*100,1) )->vardist1
>       par(mfrow=c(1,3))
>         sapply(vardist1, function(x) barplot(x,
> ylim=c(0,100),main="Varset1",xlab=names(x)))
>       par(mfrow=c(1,1))
>
> Names don't show up although names(vardist) works.
>
> Also I would like to put a single Title on this plot instead of
> repeating "Varset" three times.
>
> Any hints appreciated.
>
> Thanx
> Herry
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?