Precision (information retrieval)
- Precision (information retrieval)
In the field of information retrieval, precision is the percent of retrieved documents that are relevant to the search:
:
Precision takes all retrieved documents into account, but it can also be evaluated at a given cut-off rank, considering only the topmost results returned by the system. This measure is called precision at n or P@n.
Precision is also used with recall, the percent of "all" relevant documents that is returned by the search. The two measures are sometimes used together in the F1 Score (or f-measure) to provide a single measurement for a system.
Note that the meaning and usage of "precision" in the field of Information Retrieval differs from the definition of accuracy and precision within other branches of science and technology.
Wikimedia Foundation.
2010.
Look at other dictionaries:
Information Retrieval — [ˌɪnfɚˈmeɪʃən ɹɪˈtɹiːvəl] (IR) bzw. Informationsrückgewinnung, gelegentlich ungenau Informationsbeschaffung, ist ein Fachgebiet, das sich mit computergestütztem Suchen nach komplexen Inhalten (also z. B. keine Einzelwörter) beschäftigt und… … Deutsch Wikipedia
Information-Retrieval — [ˌɪnfɚˈmeɪʃən ɹɪˈtɹiːvəl] (IR) bzw. Informationswiedergewinnung, gelegentlich Informationsbeschaffung, ist ein Fachgebiet, das sich mit computergestütztem inhaltsorientiertem Suchen beschäftigt. Es ist ein Teilgebiet der Informationswissenschaft … Deutsch Wikipedia
Information retrieval — [ˌɪnfɚˈmeɪʃən ɹɪˈtɹiːvəl] (IR) bzw. Informationswiedergewinnung, gelegentlich Informationsbeschaffung, ist ein Fachgebiet, das sich mit computergestütztem inhaltsorientiertem Suchen beschäftigt. Es ist ein Teilgebiet der Informationswissenschaft … Deutsch Wikipedia
Information retrieval — This article is about information retrieval in general. For the fictional government department, see Brazil (film). Information retrieval (IR) is the area of study concerned with searching for documents, for information within documents, and for… … Wikipedia
Information retrieval — Recherche d information Abrégée en RI ou IR (Information Retrieval en anglais), la recherche d information est la science qui consiste à rechercher l information dans des documents les documents eux mêmes ou les métadonnées qui décrivent les… … Wikipédia en Français
Information Retrieval Facility — The Information Retrieval Facility (IRF), founded 2006 and located in Vienna, Austria, is a research platform for networking and collaboration for professionals in the field of information retrieval.The IRF has members in the following categories … Wikipedia
information retrieval — the systematic storage and recovery of data, as from a file, card catalog, or the memory bank of a computer. Abbr.: IR [1945 50] * * * Recovery of information, especially in a database stored in a computer. Two main approaches are matching words… … Universalium
Adversarial information retrieval — (adversarial IR) is a topic in information retrieval that addresses tasks such as gathering, indexing, filtering, retrieving and ranking information from collections wherein a subset has been manipulated maliciously. Adversarial IR includes the… … Wikipedia
Recall (information retrieval) — Recall in Information Retrieval is the fraction of the documents that are relevant to the query that are successfully retrieved.: mbox{recall}=frac{|{mbox{relevant documents}} In binary classification, recall is called sensitivity. So it can be… … Wikipedia
Human Computer Information Retrieval — The fields of human computer interaction (HCI) and information retrieval (IR) have both developed innovative techniques to address the challenge of navigating the complex information spaces, but their insights have to date often failed to cross… … Wikipedia
