public static float[] eval(float[] dest, NslFloat1 num, int start, int end) {

    float[] _data = num.get();

    if (start < 0) start = 0;
    if (end > _data.length) end = _data.length;

    return eval(dest, _data, start, end);
  }
  // 2
  public static float[] eval(NslFloat1 num, int start, int end) {

    float[] _data = num.get();

    if (start < 0) start = 0;
    if (end > _data.length) end = _data.length;

    int length = end - start + 1;

    return eval(new float[length], _data, start, end);
  }