Method dot

src/com/winvector/opt/impl/HelperFns.java:81–89

(final Datum row, final double[] o, final int startIndex)

	}
	
	public static double dot(final Datum row, final double[] o, final int startIndex) {
		double r = 0.0;
		final int card = row.getNIndices();
		for(int ii=0;ii<card;++ii) {
			final int i = row.getKthIndex(ii);
			r += row.getKthValue(ii)*o[i+startIndex];
		}
		return r;
	}

	public static void expScale(final double[] r) {
		final int n = r.length;