1 | package de.ugoe.cs.autoquest.commands.usage;
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2 |
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3 | import java.util.List;
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4 |
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5 | import de.ugoe.cs.autoquest.CommandHelpers;
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6 | import de.ugoe.cs.autoquest.usageprofiles.FirstOrderMarkovModel;
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7 | import de.ugoe.cs.util.console.Command;
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8 | import de.ugoe.cs.util.console.Console;
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9 | import de.ugoe.cs.util.console.GlobalDataContainer;
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10 |
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11 | /**
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12 | * <p>
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13 | * Command to calculate the entropy of first-order Markov models.
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14 | * </p>
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15 | *
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16 | * @author Steffen Herbold
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17 | * @version 1.0
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18 | */
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19 | public class CMDcalcEntropy implements Command {
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20 |
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21 | /*
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22 | * (non-Javadoc)
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23 | *
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24 | * @see de.ugoe.cs.util.console.Command#help()
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25 | */
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26 | @Override
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27 | public String help() {
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28 | return "calcEntropy <modelname>";
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29 | }
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30 |
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31 | /*
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32 | * (non-Javadoc)
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33 | *
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34 | * @see de.ugoe.cs.util.console.Command#run(java.util.List)
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35 | */
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36 | @Override
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37 | public void run(List<Object> parameters) {
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38 | String modelname = "";
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39 | try {
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40 | modelname = (String) parameters.get(0);
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41 | } catch (Exception e) {
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42 | throw new IllegalArgumentException();
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43 | }
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44 |
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45 | FirstOrderMarkovModel model = null;
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46 | Object dataObject = GlobalDataContainer.getInstance()
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47 | .getData(modelname);
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48 | if (dataObject == null) {
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49 | CommandHelpers.objectNotFoundMessage(modelname);
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50 | return;
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51 | }
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52 | if (!(dataObject instanceof FirstOrderMarkovModel)) {
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53 | CommandHelpers.objectNotType(modelname, "FirstOrderMarkovModel");
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54 | return;
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55 | }
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56 | model = (FirstOrderMarkovModel) dataObject;
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57 | double entropy = model.calcEntropy();
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58 | if (!Double.isNaN(entropy)) {
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59 | Console.println("entropy: " + entropy);
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60 | }
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61 | }
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62 |
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63 | }
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