package ca.pfv.spmf.test;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import ca.pfv.spmf.algorithms.frequentpatterns.eclat.AlgoEclat;
import ca.pfv.spmf.input.transaction_database_list_integers.TransactionDatabase;
import ca.pfv.spmf.patterns.itemset_array_integers_with_count.Itemsets;
/**
* Example of how to use ECLAT algorithm from the source code.
* @author Philippe Fournier-Viger - 2009
*/
public class MainTestEclat_saveToMemory {
public static void main(String [] arg) throws IOException{
// Loading the binary context
TransactionDatabase database = new TransactionDatabase();
try {
database.loadFile(fileToPath("contextPasquier99.txt"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// context.printContext();
// Applying the ECLAT algorithm
AlgoEclat algo = new AlgoEclat();
Itemsets patterns = algo.runAlgorithm(null, database, 0.4, true);
// NOTE 0: We use "null" as output file path, because in this
// example, we want to save the result to memory instead of
// saving to a file
// NOTE 1: if you use "true" in the line above, CHARM will use
// a triangular matrix for counting support of itemsets of size 2.
// For some datasets it should make the algorithm faster.
patterns.printItemsets(database.size());
algo.printStats();
}
public static String fileToPath(String filename) throws UnsupportedEncodingException{
URL url = MainTestEclat_saveToMemory.class.getResource(filename);
return java.net.URLDecoder.decode(url.getPath(),"UTF-8");
}
}