@Override
	public String toString() {
		StringBuffer sb = new StringBuffer();
		sb.append("numberOfSamples:" + numberOfSamples + "\tN:" + n + "\nSamples:\n");

		// Show samples
		for( int ns = 0; ns < numberOfSamples; ns++ ) {
			sb.append(ns + ":\t");
			for( int i = 0; i < n; i++ )
				sb.append(samples[ns][i] + " ");
			sb.append("\n");
		}

		// Show rankSums
		sb.append("\nRankSums:\n");
		for( int ns = 0; ns < numberOfSamples; ns++ ) {
			sb.append(ns + ":\t");
			for( int i = 0; i < n; i++ )
				sb.append(rankSum[ns][i] + " ");
			sb.append("\n");
		}
		return sb.toString();
	}