public XYSeries getPairwiseDifsDistribution() {
		ArrayList<Point2D> ser = new ArrayList<Point2D>();
		int count = 0;
		int total = seqs.size()*(seqs.size()-1)/2;
		int step = total/10+1;
		int[] hist = new int[seqs.getMaxSeqLength()];
		for (int i=0; i<seqs.size(); i++) {
			
			for(int j=i+1; j<seqs.size(); j++) {
				int difs = numDifs(seqs.get(i), seqs.get(j));
				hist[difs]++;
				count++;
			}
		}
		
		int lowerCutoff = 0;
		while(lowerCutoff< hist.length && hist[lowerCutoff]==0)
			lowerCutoff++;
		
		int upperCutoff = hist.length-1;
		while(upperCutoff>lowerCutoff && hist[upperCutoff]==0)
			upperCutoff--;
			
		
		for(int i=lowerCutoff; i<=upperCutoff; i++) {
			ser.add(new Point2D.Double(i, hist[i]));
		}
		XYSeries cData = new XYSeries(ser);

		return cData;
	}