33. Recall of Your POI Identifier

Question:

What’s the recall?

(Note: you may see a message like UserWarning: The precision and recall are equal to zero for some labels . Just like the message says, there can be problems in computing other metrics (like the F1 score) when precision and/or recall are zero, and it wants to warn you when that happens.)



Obviously this isn’t a very optimized machine learning strategy (we haven’t tried any algorithms besides the decision tree, or tuned any parameters, or done any feature selection), and now seeing the precision and recall should make that much more apparent than the accuracy did.