def htseq_counts_chart (self):
        """ Make the HTSeq Count assignment rates plot """
        cats = OrderedDict()
        cats['assigned'] =      { 'name': 'Assigned' }
        cats['ambiguous'] =     { 'name': 'Ambiguous' }
        cats['alignment_not_unique'] = { 'name': 'Alignment Not Unique' }
        cats['no_feature'] =    { 'name': 'No Feature' }
        cats['too_low_aQual'] = { 'name': 'Too Low aQual' }
        cats['not_aligned'] =   { 'name': 'Not Aligned' }
        config = {
            'id': 'htseq_assignment_plot',
            'title': 'HTSeq: Count Assignments',
            'ylab': '# Reads',
            'hide_zero_cats': False,
            'cpswitch_counts_label': 'Number of Reads'
        }
        return bargraph.plot(self.htseq_data, cats, config)
Make the HTSeq Count assignment rates plot