Scoring SAS Enterprise Miner

dee2017 — Fri, 15 Sep 2017 09:55:37 GMT

Hello,

I am trying to score new data. I have a classification problem. One of the variables is the target. It is set to 1 if true and 0 if false. But how will i know from the score node output, how many have been classified into one class and another into another class? Isn't that the point of scoring?

Thanks

Dee

Re: Scoring SAS Enterprise Miner

DougWielenga — Fri, 15 Sep 2017 15:26:27 GMT

For your analysis, SAS Enterprise Miner generated

P_PATIENT_ALIVE_FLAG1: the probability that PATIENT_ALIVE_FLAG = 1

P_PATIENT_ALIVE_FLAG0: the probability that PATIENT_ALIVE_FLAG = 0

The assignment to an outcome is ultimately a modeling decision. In your previous note, you shared results which indicated that you had a target variable named

PATIENT_ALIVE_FLAG

which could be either 1 or 0 (alive or dead, presumably). In this case, SAS Enterprise Miner would create two prediction variables to store the probability of each outcome:

P_PATIENT_ALIVE_FLAG1 = the probability that PATIENT_ALIVE_FLAG=1 for the observation

P_PATIENT_ALIVE_FLAG0 = the probability that PATIENT_ALIVE_FLAG=0 for the observation

as well as an 'Into' variable which predicts which class is most likely based on the larger of the two values above, and this variable would be named (in this example)

I_PATIENT_ALIVE_FLAG = the most likely outcome based on the two probabilities described above

It is possible, however, that you might not want to predict PATIENT_ALIVE_FLAG = 0 unless there is a very high probability that this was the case (e.g. perhaps only when P_PATIENT_ALIVE_FLAG0 is greater than 0.9). In any case, the software can compute the probabilities but you need to decide what the threshold should be to determine if you predict PATIENT_ALIVE_FLAG=1 or PATIENT_ALIVE_FLAG=0. It is then easy to assign the observations to a category based on the cutoff you choose.

Hope this helps!

Doug

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Scoring SAS Enterprise Miner

Re: Scoring SAS Enterprise Miner