Saves data to current dataset.

        :param data: data to save to file
        :type data: numpy.ndarray
        :param stamp: time stamp of when the data was acquired
        :type stamp: str

def save_to_file(self, data, stamp):
        """Saves data to current dataset.

        :param data: data to save to file
        :type data: numpy.ndarray
        :param stamp: time stamp of when the data was acquired
        :type stamp: str
        """
        self.datafile.append(self.current_dataset_name, data)
        # save stimulu info
        info = dict(self._stimulus.componentDoc().items() + self._stimulus.testDoc().items())
        print 'saving doc', info
        info['time_stamps'] = [stamp]
        info['samplerate_ad'] = self.player.aifs
        self.datafile.append_trace_info(self.current_dataset_name, info)