[R] libary(Rweka) J48 design tree

[RMSOPS]

Hello everybody

I'm having some difficulties to design the decision tree algorithm J48.
I am using the following code and when I run it gives me the following
message
plot(m1)
Error in plot.Weka_tree(m1) : 
  Plotting of trees with multi-way splits is currently not implemented.


#The code
library(RWeka)
library(randomForest)
library(party)
if(require(mlbench, quietly = TRUE) && require(party, quietly = TRUE)) 
m1 <- J48(income2 ~ age+workclass+native.country, data = dataset)
m1
plot(m1)
and results
#M1 Results
workclass = ?: <=50K (1433.0/120.0)
workclass = Federal-gov: <=50K (696.0/281.0)
workclass = Local-gov: <=50K (1542.0/469.0)
workclass = Never-worked: <=50K (5.0)
workclass = Private: <=50K (16939.0/3705.0)
workclass = Self-emp-inc
|   age <= 36: <=50K (205.0/65.0)
|   age > 36: >50K (652.0/247.0)
workclass = Self-emp-not-inc: <=50K (1926.0/525.0)
workclass = State-gov: <=50K (1010.0/262.0)
workclass = Without-pay: <=50K (13.0/2.0)

Number of Leaves  : 	10

Size of the tree : 	12

I tried installing the package RGraphviz, but is not available in CRAN
repository.
I wonder if there is a package that lets you draw decision trees in a way
more effective than the library(party)

which the classification algorithms more efficient in R

Thanks

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