Fix for OneVersusAll Multiclass trainer#4698
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kere-nel merged 5 commits intodotnet:masterfrom Jan 28, 2020
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harishsk
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Jan 24, 2020
| Host.Check(Utils.Size(outputs) >= 1); | ||
| string opType = "LinearRegressor"; | ||
| string scoreVarName = (Utils.Size(outputs) == 2) ? outputs[1] : outputs[0]; // Get Score from PredictedLabel and/or Score columns | ||
| string scoreVarName = (Utils.Size(outputs) >= 2) ? outputs[1] : outputs[0]; // Get Score from PredictedLabel and/or Score columns |
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What cases result in the output size being greater than 2?
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When a calibrator is used, the probability column is added. More specifically, the OVA trainer always creates a probability output column, so the output count will be 3. An alternative would be to distinguish between trainers that need the probability column and those that don't inside OVA, but I think that would be more involved.
Codecov Report
@@ Coverage Diff @@
## master #4698 +/- ##
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- Coverage 75.84% 75.83% -0.01%
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Files 951 951
Lines 172594 172613 +19
Branches 18632 18632
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+ Hits 130896 130904 +8
- Misses 36523 36529 +6
- Partials 5175 5180 +5
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Also adding tests for OVA with FastForest, LinearSVM, and AveragedPerceptron.