Functionality of prediction_id in predict of Activity Classifier

[shreyajain17]

The functionality of prediction_id column given as output of predict when making prediction per window is not clear in documentation. The output given at the moment is the following.

|      253      |   1    | [  4.63483302e-04   9.9950... |
|      254      |   1    | [  7.90477672e-04   9.9914... |
|      255      |   1    | [  4.41032015e-02   9.5374... |
|      256      |   2    | [  7.02369167e-03   2.4149... |
|      257      |   2    | [  5.60363929e-04   3.1854... |
|      258      |   2    | [  1.27506602e-04   6.1436... |
|      259      |   2    | [  6.75232295e-05   2.6096... |

[shreyajain17]

@nickjong I don't think it should be solved with docs though. I mean the column prediction_id has no use if it just like the index/row number of the SFrame.

[nickjong]

From offline discussion, sounds like this is an occasion where the code is wrong, and needs to be fixed to match the intent captured in the user guide

[srikris]

@nickjong Is this fixed in #2431. If so, can this be closed?

[syoutsey]

If the prediction_id has been removed from the output, then we'll also want to update the docs to match this.

[nickjong]

No, our end goal was not to remove prediction ID but to implement it correctly (starting over from 1 within each session). In #2431 we punted on doing it correctly and just removed it temporarily.