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package net.sourceforge.combean.mathprog.linalg.statics; |
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import java.util.Set; |
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import java.util.TreeSet; |
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import net.sourceforge.combean.interfaces.mathprog.linalg.SparseVec; |
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import net.sourceforge.combean.interfaces.mathprog.linalg.VectorIterator; |
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19 | 0 | public class SparseVectorUtil { |
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public static final <Label> double sum(SparseVec<Label> vec) { |
28 | 36 | double result = 0.0; |
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30 | 36 | VectorIterator<Label> itVec = vec.iterator(); |
31 | 144 | while (itVec.hasNext()) { |
32 | 108 | result += itVec.next().doubleValue(); |
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} |
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35 | 36 | return result; |
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} |
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public static final <Label> Set<Label> collectLabels(SparseVec<Label> vec) { |
39 | 0 | Set<Label> labels = new TreeSet<Label>(); |
40 | 0 | VectorIterator<Label> itVec = vec.iterator(); |
41 | 0 | while (itVec.hasNext()) { |
42 | 0 | labels.add(itVec.next().label()); |
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} |
44 | 0 | return labels; |
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} |
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} |