CountRatioMetric

class rubin_sim.maf.metrics.CountRatioMetric(col=None, norm_val=1.0, metric_name=None, units='', **kwargs)

Bases: BaseMetric

Count the length of a simData column slice, then divide by ‘norm_val’.

Methods Summary

run(data_slice[, slice_point])

Calculate metric values.

Methods Documentation

run(data_slice, slice_point=None)

Calculate metric values.

Parameters:

data_slicenumpy.recarray

Values passed to metric by the slicer, which the metric will use to calculate metric values at each slice_point.

slice_pointdict or None

Dictionary of slice_point metadata passed to each metric. E.g. the ra/dec of the healpix pixel or opsim fieldId.

Returns:

metricValue: int float or object

The metric value at each slice_point.