@Override
	public int hashCode() {
		return
			hash(_domain,
			hash(_d,
			hash(_k,
			hash(_x1,
			hash(_x2,
			hash(_y1,
			hash(_y2)))))));
	}
Return a new PDF object.

<p>
<img
    src="doc-files/linear-pdf.gif"
    alt="f(x) = \left(
                     \frac{y_2-y_1}{x_2-x_1} \cdot x +
                     y_1-\frac{y_2-y_1}{x_2-x_1}\cdot x_1
                \right)"
>
</p>
jenetics.incubator/src/main/java/io/jenetics/incubator/stat/LinearDistribution.java