Précision et Rappel
- Précision: Systeme precis = bzaf les documents renvoyé ykono pertinent
- Rappel: bzaf rappel = bzaf les documents pertinent ykono renvoyé en gros precision par rapport el ga3 li trenvoyaw ou rappel par rapport el ga3 el corpus
- Mo3adalat: R: Documents rapportés (swala7 li reja3hom systeme) P: Collection des documents pertinents (swala7 li nichan) Rr: Documets pertinents rapportés (swala7 nichan li reja3hom systeme)
- Relation: En general kayen Relation inverse kol matetla3 precision yahbet el rappel ki tjarab dir exemple men rassek tji bizarre bsa7 ki tchouf example réel tji logique ktar
A brain surgeon removing a cancerous tumor from a patient’s brain illustrates the tradeoffs as well: The surgeon needs to remove all of the tumor cells since any remaining cancer cells will regenerate the tumor. Conversely, the surgeon must not remove healthy brain cells since that would leave the patient with impaired brain function. The surgeon may be more liberal in the area of the brain they remove to ensure they have extracted all the cancer cells. This decision increases recall but reduces precision. On the other hand, the surgeon may be more conservative in the brain cells they remove to ensure they extract only cancer cells. This decision increases precision but reduces recall. That is to say, greater recall increases the chances of removing healthy cells (negative outcome) and increases the chances of removing all cancer cells (positive outcome). Greater precision decreases the chances of removing healthy cells (positive outcome) but also decreases the chances of removing all cancer cells (negative outcome).
Remarque
- Kayen Tani F mesure dir equilibre mabin Precision ou Rappel
- F tale3 mli7
- F habet mchi mli7