Esempio n. 1
0
  public Matrix createVector(BitVector selector) {
    int rows = selector != null ? selector.countOnBits() : frame.size();
    Matrix m = new Matrix(rows, 1);

    for (int i = 0, j = 0; j < frame.size(); j++) {
      if (selector == null || selector.isOn(j)) {
        M rowValue = frame.object(j);

        try {
          Number numValue = (Number) numericField.get(rowValue);
          m.set(i, 0, numValue.doubleValue());

        } catch (IllegalAccessException e) {
          e.printStackTrace();
          throw new IllegalStateException(
              String.format(
                  "Couldn't access field %s: %s", numericField.getName(), e.getMessage()));
        }

        i++;
      }
    }

    return m;
  }
Esempio n. 2
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  public Matrix createVector() {
    int rows = frame.size();
    Matrix m = new Matrix(rows, 1);

    for (int i = 0; i < rows; i++) {
      M rowValue = frame.object(i);
      try {
        Number numValue = (Number) numericField.get(rowValue);
        m.set(i, 0, numValue.doubleValue());

      } catch (IllegalAccessException e) {
        e.printStackTrace();
        throw new IllegalStateException(
            String.format("Couldn't access field %s: %s", numericField.getName(), e.getMessage()));
      }
    }

    return m;
  }
Esempio n. 3
0
  public Predicted(DataFrame<M> f, String pfn) {
    frame = f;
    numericField = null;

    Class<M> mcls = frame.getModelClass();

    try {
      Field mf = mcls.getField(pfn);
      Class t = mf.getType();
      if (Model.isSubclass(t, Number.class)) {
        numericField = mf;
      } else {
        throw new IllegalArgumentException(
            String.format("Field %s is not numeric", pfn, t.getName()));
      }

    } catch (NoSuchFieldException e) {
      e.printStackTrace();
      throw new IllegalArgumentException(String.format("Unknown field name: %s", pfn));
    }
  }