TotalUnassociatedDiaObjectsMetricTask

class lsst.ap.association.metrics.TotalUnassociatedDiaObjectsMetricTask(**kwargs)

Bases: ApdbMetricTask

Task that computes the number of DIAObjects with only one associated DIASource.

Methods Summary

makeMeasurement(dbHandle, outputDataId)

Compute the number of unassociated DIAObjects.

Methods Documentation

makeMeasurement(dbHandle, outputDataId)

Compute the number of unassociated DIAObjects.

Parameters

dbHandlelsst.dax.apdb.Apdb

A database instance.

outputDataIdany data ID type

The subset of the database to which this measurement applies. Must be empty, as the number of unassociated sources is ill-defined for subsets of the dataset.

Returns

measurementlsst.verify.Measurement

The total number of unassociated objects.

Raises

MetricComputationError

Raised on any failure to query the database.

ValueError

Raised if outputDataId is not empty