Name of variables at FPGrowth in weka

[elisya]

hello, I have learned and understand the concept and theory of FPGrowth, but
I'm too confused when I try to understand its implementation (code) in weka.
actually, I need to know what kind of output from every variable of FPGrowth
in weka for my thesis matters. but sometimes, when I did sys.out.println in
java program for some variables, the output is not what I expect.

for example, I did it for "largeItemSets" in order to know which frequent
patterns has to be mined, why this output is come out?

main.FPGrowth$FrequentItemSets@75e4fc
main.FPGrowth$FrequentItemSets@c62c8
main.FPGrowth$FrequentItemSets@12940b3
main.FPGrowth$FrequentItemSets@156b6b9
main.FPGrowth$FrequentItemSets@1f66cff
main.FPGrowth$FrequentItemSets@16de49c
main.FPGrowth$FrequentItemSets@1bbf1ca
main.FPGrowth$FrequentItemSets@1ff0dde
main.FPGrowth$FrequentItemSets@1901437
main.FPGrowth$FrequentItemSets@1f6226
main.FPGrowth$FrequentItemSets@64ea66
main.FPGrowth$FrequentItemSets@158f9d3

anybody know what it means? which name of variable that consists of frequent
pattern exactly?

I use this data, fill 0.2 for lowerminsup and 0.9 for confidence metric.

@RELATION user1
@ATTRIBUTE unknown {0,1}
@ATTRIBUTE action {0,1}
@ATTRIBUTE adventure {0,1}
@ATTRIBUTE animation {0,1}
@ATTRIBUTE childrens {0,1}
@ATTRIBUTE comedy {0,1}
@ATTRIBUTE crime {0,1}
@ATTRIBUTE documentary {0,1}
@ATTRIBUTE drama {0,1}
@ATTRIBUTE fantasy {0,1}
@ATTRIBUTE film-noir {0,1}
@ATTRIBUTE horror {0,1}
@ATTRIBUTE musical {0,1}
@ATTRIBUTE mystery {0,1}
@ATTRIBUTE romance {0,1}
@ATTRIBUTE sci-fi {0,1}
@ATTRIBUTE thriller {0,1}
@ATTRIBUTE war {0,1}
@ATTRIBUTE western {0,1}
@DATA
0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0
0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0
0,1,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0
0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,0,0

thanks for your help.

[Mark]

FrequentItemSets does not have a toString() method. It does have an iterator() method that returns an Iterator<FrequentBinaryItemSet> over the collection of frequent item sets. FrequentBinaryItemSet has a toString() method that prints out a textual description of the item set.

Cheers,
Mark.

[elisya]

can you kindly help me explain how to print the frequent item sets out?
I'm not a programmer. so I cant understand the code easily
I tried to do this

public Iterator<FrequentBinaryItemSet> iterator()
{
System.out.println(m_sets.iterator());
return m_sets.iterator();
}

but it printed this out

java.util.AbstractList$Itr@4aa0ce
java.util.AbstractList$Itr@1833eca
java.util.AbstractList$Itr@18f5824
java.util.AbstractList$Itr@1e3cd51
java.util.AbstractList$Itr@bc8e1e
java.util.AbstractList$Itr@11671b2
java.util.AbstractList$Itr@82764b
java.util.AbstractList$Itr@12452e8

how can I know the frequent item sets inside? it's not able to be printed out or what?
please help, it makes me so depressed.
thank you.

[Mark]

for (FrequentBinaryItemSet set : m_sets) {
System.out.println(set);
}

Cheers,
Mark.

[elisya]

for (FrequentBinaryItemSet set : m_sets) {
System.out.println(set);
}

Cheers,
Mark.

do you mean this code?

for (FrequentBinaryItemSet i : m_sets)

I dont find 'set' but 'i'.
but its not print anything out when I type

for (FrequentBinaryItemSet i : m_sets){
System.out.println(i);
}

how to solve this? please reply.
thank you so much.

[Mark]

It seems that I'm answering too many questions here and on the mailing list too quickly :-) Actually, FrequentItemSets does have a toString() method but it takes an integer argument (the maximum number of item sets to display). Try putting this in your code:

System.out.println(m_largeItemSets.toString(50000));

Cheers,
Mark.