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Metrics for Search Evaluation
When it comes to evaluating the performance of search engines, several metrics are used to measure the effectiveness of the search results. Here are some key metrics commonly used in search evaluation:
| Metric |
Description |
| Precision |
Precision is the ratio of relevant documents retrieved by the search engine to the total number of documents retrieved. It measures the accuracy of the search results. |
| Recall |
Recall is the ratio of relevant documents retrieved by the search engine to the total number of relevant documents in the collection. It measures the completeness of the search results. |
| Mean Reciprocal Rank (MRR) |
Mean Reciprocal Rank is the average of the reciprocal ranks of the first relevant document retrieved by the search engine. It is used to evaluate the effectiveness of the search engine in returning relevant results. |
| Discounted Cumulative Gain (DCG) |
Discounted Cumulative Gain is a measure of ranking quality. It takes into account both the relevance and the ranking position of the documents retrieved by the search engine. |
| Normalized Discounted Cumulative Gain (NDCG) |
Normalized Discounted Cumulative Gain is the normalized version of DCG. It provides a more meaningful comparison of search engine performance across different queries and datasets. |
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