Hi Martin,

Do we have confusion matrix somewhere in the classification statistics?
It provides more information than just true positives.

Best regards,
Nina


Martin Guetlein wrote:
> Hello All,
>
> as Harry noted in one of the last meetings, the classification
> statistics in the validation object only take binary classification
> into account so far. There can of course be more than one class value
> (e.g. inacitve, moderately-active, active).
> Hence, some classification results (e.g. numTruePositives) are now
> available multiple times (once for each class-value).
>
> As collections are not allowed in OWL-DL, I had to create
> intermediate classes (following the scheme Nina proposed for the
> dataset). Here is how an example of the Classification Statistics
> Object may look like:
>
> [[
> default:thisClassificationStatistics
>   a ot:classificationStatistics ;
>
>   ot:accuracy "99.0"^^xsd:float ; # accuracy is only available once
>   ot:numberUnclassified "26"^^xsd:int ;
>   ...
>
>   ot:classStatisticEntry
>     [ a ot:classStatisticEntry ;
>       ot:classValue "moderately_active"^^String ;
>       ot:classStatisticValue
>         [ a ot:ClassStatisticValue ;
>           ot:classStatistic default:areaUnderRocCurve ;
>           ot:value "0.77"^^:xsd:float ;
>         ] ;
>       ot:classStatisticValue
>         [ a ot:ClassStatisticValue ;
>           ot:classStatistic default:numTruePositives ;
>           ot:value "123"^^:xsd:int ;
>         ] ;
>       ot:classStatisticValue
>       ...
>
>   ot:classStatisticEntry
>     [ a ot:classStatisticEntry ;
>       ot:classValue "intactive"^^String ;
>       ...
>
>   ot:classStatisticEntry
>     [ a ot:classStatisticEntry ;
>       ot:classValue "active"^^String ;
>       ...
> ]]
>
> Here is the old classification statistics object (I renamed it from
> ClassifcationInformation to ClassificationStatistics):
> http://www.opentox.org/data/documents/development/RDF%20files/Validation/#-ot-classificationinfo-rdf
>
> Any comments, corrections before I add that to the opentox.owl?
>
> Best regards,
> Martin
>
>
>