Re: how to calculate relevancy by the help of precision and recall
Interesting topic. Not elasticsearch specific, but nevertheless interesting. One method to calculate relevancy given the precision and recall of a query is by using the F1 score: http://en.wikipedia.org/wiki/F1_score F1 would be equal to 2 * (P * R) / (P + R), where P is the precision and R is the recall. I am glad someone is using elasticsearch as a search engine. Lately it feels like it is mainly an analytical tool. :) Cheers, Ivan On Tue, Feb 4, 2014 at 10:06 PM, Navneet Mathpal navneetmathpa...@gmail.com wrote: Hi, I want to know how do we calculate relevancy with the help of precision and reacall, for example:- A = The number of relevant records retrieved, B = The number of relevantrecords not retrieved, and C = The number of irrelevant records retrieved. In this example A = 45, B = 35(80-45)and C = 15(60-45) Recall =(45 / (45 + 35)) * 100% = 45/80 * 100% =56% Precision =(45 / (45 + 15)) * 100% = 45/60 * 100% =75% what would be its relevancy how how ? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/0c5e3d1e-b58b-4ff1-a893-0cfbaef87aa8%40googlegroups.com . For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQCA2jdxr9G0p9fL6FVx%3DRvt5GH-O2vLsXb2N41OeCA5sw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how to calculate relevancy by the help of precision and recall
hey thanks ivan :) On Wednesday, 5 February 2014 12:44:46 UTC+5:30, Ivan Brusic wrote: Interesting topic. Not elasticsearch specific, but nevertheless interesting. One method to calculate relevancy given the precision and recall of a query is by using the F1 score: http://en.wikipedia.org/wiki/F1_score F1 would be equal to 2 * (P * R) / (P + R), where P is the precision and R is the recall. I am glad someone is using elasticsearch as a search engine. Lately it feels like it is mainly an analytical tool. :) Cheers, Ivan On Tue, Feb 4, 2014 at 10:06 PM, Navneet Mathpal navneetm...@gmail.comjavascript: wrote: Hi, I want to know how do we calculate relevancy with the help of precision and reacall, for example:- A = The number of relevant records retrieved, B = The number of relevantrecords not retrieved, and C = The number of irrelevant records retrieved. In this example A = 45, B = 35(80-45)and C = 15(60-45) Recall =(45 / (45 + 35)) * 100% = 45/80 * 100% =56% Precision =(45 / (45 + 15)) * 100% = 45/60 * 100% =75% what would be its relevancy how how ? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearc...@googlegroups.com javascript:. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/0c5e3d1e-b58b-4ff1-a893-0cfbaef87aa8%40googlegroups.com . For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/ec8db27b-761b-4af5-a59b-fbd7901c5d8c%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how to calculate relevancy by the help of precision and recall
Ivan but On Wednesday, 5 February 2014 11:36:50 UTC+5:30, Navneet Mathpal wrote: Hi, I want to know how do we calculate relevancy with the help of precision and reacall, for example:- A = The number of relevant records retrieved, B = The number of relevantrecords not retrieved, and C = The number of irrelevant records retrieved. In this example A = 45, B = 35(80-45)and C = 15(60-45) Recall =(45 / (45 + 35)) * 100% = 45/80 * 100% =56% Precision =(45 / (45 + 15)) * 100% = 45/60 * 100% =75% what would be its relevancy how how ? -- You received this message because you are subscribed to the Google Groups elasticsearch group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/a3fff8c4-c80b-4b78-9f3b-0ee38dd9b6b5%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
