※ 引述《catalyst (abc)》之铭言： : 请问在做NCBI的blasting时 : 最後跑出来的表会有 : Max score : Total score : Query coverage : E value The Expect value (E) is a parameter that describes the number of hits one can "expect" to see just by chance when searching a database of a particular size. It decreases exponentially with the Score (S) that is assigned to a match between two sequences. Essentially, the E value describes the random background noise that exists for matches between sequences. P-values The number of random HSPs with score >= S is described by a Poisson distribution. : Max ident : 这些的意义到底是指什麽？我只知道数字越大 代表相似度越高 : 不过个别的意义有代表什麽不同的解释吗？ : 用了好久的ncbi一直没搞懂 : 谢谢指教了~ The Statistics of Sequence Similarity Scores http://www.ncbi.nlm.nih.gov/BLAST/tutorial/Altschul-1.html --

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