Monday, April 7, 2008

When uploading PMML example files into ADAPA, I get computed and expected values. What do they mean?

Each of the examples listed in the Zementis website is composed of two files: a PMML model file (.xml) and a validation file (.csv).

Given that the models have been built in a tool other than ADAPA, we want to make sure that both development tool and ADAPA produce the same results. This is done by supplying ADAPA with the expected results for a number of input records. When this happens, ADAPA will automatically compare the given expected value with its own computed value. If the both values match for all records (and given enough validation records), we can feel confident that ADAPA has uploaded the model correctly. When this happens, there is no longer the need to supply ADAPA with the expected results, since all we really want from now on is to get the computed results back.

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