@Override
	public String toString() {
		return format(
			"TrialMeter[sample=%d, param=%d]",
			dataSize(), _dataSet.nextParamIndex()
		);
	}
Calculates the test values for all parameters. The length of the
resulting {@code double[]} array must be {@link #dataSize()}.

@param function the test function
jenetics.tool/src/main/java/io/jenetics/tool/trial/TrialMeter.java