Tool to compute statistical measures of Precision and Recall. Precision and recall are two statistical measures which can evaluate sets of items, also called predictive value, specificity and sensitivity.
Precision and Recall - dCode
Tag(s) : Data Processing, Mathematics
dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!
Tool to compute statistical measures of Precision and Recall. Precision and recall are two statistical measures which can evaluate sets of items, also called predictive value, specificity and sensitivity.
For a search, the precision is the ratio of the number of pertinent items found over the total number of items found.
$$ \text{Precision}=\frac{|\{\text{Relevant items}\}\cap\{\text{Retrieved items}\}|}{|\{\text{Retrieved items}\}|} $$
Example: Consider the expected set: A,B,C,D,E (5 items), and the retrieved/found set : B,C,D,F (4 items). The set of expected items retrieved is B,C,D (3 common items). The precision is $$ P = \frac{3}{4} = 75\% $$
The recall is the ratio of the number of pertinent items found over the total number of relevant items.
$$ \text{Recall}=\frac{|\{\text{Relevant items}\}\cap\{\text{Retrieved items}\}|}{|\{\text{Relevant items}\}|} $$
Example: Consider the expected set: A,B,C,D,E (5 items), and the retrieved/found set : B,C,D,F (4 items). The set of expected items retrieved is B,C,D (3 common items). The recall is $$ R = \frac{3}{5} = 60\% $$
In statistics, F-measure (or F1 score) is the harmonic mean of precision $ P $ and recall $ R $
$$ F = \frac{2 (P \times R)}{(P + R)} $$
The following diagram includes precision, recall, true positive, false positive, true negative and false negative (source wikipedia)
dCode retains ownership of the online 'Precision and Recall' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (PHP, Java, C#, Python, Javascript, Matlab, etc.) no data, script or API access will be for free, same for Precision and Recall download for offline use on PC, tablet, iPhone or Android !
Please, check our community Discord for help requests!