nlp - How to represent Dependency Triplets in .arff file format? -

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i'm developing classifier text categorisation using weka java libraries. i've extracted number of features using stanfords' corenlp package, including dependency parse of text returns string "(rel, head, mod)".

i wanting use dependency triplets returned features classification cannot figure out how represent them in arff file. basically, i'm stumped; each instance, there arbitrary number of dependency triplets, can't define them explicitly in attributes, example:

@attribute entitycount numeric @attribute deptriple_1 string @attribute deptriple_2 string . . @attribute deptriple_n string

is there particular way go this? i've spent better part of day searching , have not found yet.

thanks lot reading.

extracted weka wiki:

import weka.core.attribute; import weka.core.fastvector; import weka.core.instance; import weka.core.instances;  /**  * generates little arff file different attribute types.  *  * @author fracpete  */ public class so_test {   public static void main(string[] args) throws exception {     fastvector      atts;     fastvector      attsrel;     fastvector      attvals;     fastvector      attvalsrel;     instances       data;     instances       datarel;     double[]        vals;     double[]        valsrel;     int             i;      // 1. set attributes     atts = new fastvector();     // - numeric     atts.addelement(new attribute("att1"));     // - nominal     attvals = new fastvector();     (i = 0; < 5; i++)       attvals.addelement("val" + (i+1));     atts.addelement(new attribute("att2", attvals));     // - string     atts.addelement(new attribute("att3", (fastvector) null));     // - date     atts.addelement(new attribute("att4", "yyyy-mm-dd"));     // - relational     attsrel = new fastvector();     // -- numeric     attsrel.addelement(new attribute("att5.1"));     // -- nominal     attvalsrel = new fastvector();     (i = 0; < 5; i++)       attvalsrel.addelement("val5." + (i+1));     attsrel.addelement(new attribute("att5.2", attvalsrel));     datarel = new instances("att5", attsrel, 0);     atts.addelement(new attribute("att5", datarel, 0));      // 2. create instances object     data = new instances("myrelation", atts, 0);      // 3. fill data     // first instance     vals = new double[data.numattributes()];     // - numeric     vals[0] = math.pi;     // - nominal     vals[1] = attvals.indexof("val3");     // - string     vals[2] = data.attribute(2).addstringvalue("this string!");     // - date     vals[3] = data.attribute(3).parsedate("2001-11-09");     // - relational     datarel = new instances(data.attribute(4).relation(), 0);     // -- first instance     valsrel = new double[2];     valsrel[0] = math.pi + 1;     valsrel[1] = attvalsrel.indexof("val5.3");     datarel.add(new instance(1.0, valsrel));     // -- second instance     valsrel = new double[2];     valsrel[0] = math.pi + 2;     valsrel[1] = attvalsrel.indexof("val5.2");     datarel.add(new instance(1.0, valsrel));     vals[4] = data.attribute(4).addrelation(datarel);     // add     data.add(new instance(1.0, vals));      // second instance     vals = new double[data.numattributes()];  // important: needs new array!     // - numeric     vals[0] = math.e;     // - nominal     vals[1] = attvals.indexof("val1");     // - string     vals[2] = data.attribute(2).addstringvalue("and one!");     // - date     vals[3] = data.attribute(3).parsedate("2000-12-01");     // - relational     datarel = new instances(data.attribute(4).relation(), 0);     // -- first instance     valsrel = new double[2];     valsrel[0] = math.e + 1;     valsrel[1] = attvalsrel.indexof("val5.4");     datarel.add(new instance(1.0, valsrel));     // -- second instance     valsrel = new double[2];     valsrel[0] = math.e + 2;     valsrel[1] = attvalsrel.indexof("val5.1");     datarel.add(new instance(1.0, valsrel));     vals[4] = data.attribute(4).addrelation(datarel);     // add     data.add(new instance(1.0, vals));      // 4. output data     system.out.println(data);   } }

your problem in particular "relational" attribute. code segment has dealt such relational attribute.


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