The Author Online Book Forums are Moving

The Author Online Book Forums will soon redirect to Manning's liveBook and liveVideo. All book forum content will migrate to liveBook's discussion forum and all video forum content will migrate to liveVideo. Log in to liveBook or liveVideo with your Manning credentials to join the discussion!

Thank you for your engagement in the AoF over the years! We look forward to offering you a more enhanced forum experience. (10) [Avatar] Offline
On page 69 ( 73 in the pdf) The formula for precision and recall are the same. But the text description indicates that these are slightly different concepts and should have a different formula.
Both show : tp / ( tp + fp )
460365 (1) [Avatar] Offline
Good Point John. Formula for Precision is correct.
For Recall is should be tp/(tp+fn)

I hope this will be corrected.

Nishant Shukla (52) [Avatar] Offline
Thank you for catching this mistake! All fixed!
467323 (1) [Avatar] Offline
In V9 error again in recall formula.
Nishant Shukla (52) [Avatar] Offline
You're right... It seems like Manning didn't update the figures to chapter 4. I'll check with them right away.