def __init__( self, ex, summarised_results = None ):
super(SummaryExperiment, self).__init__(ex)<EOL>self._summarised_results = summarised_results<EOL>
Create a summarised version of the given experiment. The given
        fields in the experimental results will be summarised, defaulting to all.
        If there are fields that can't be summarised (because they're not
        numbers), remove them here.

        :param ex: the underlying experiment
        :param summarised_results: list of result values to summarise (defaults to all)