2
我正在學習潛在語義分析(LSA),我能夠構建術語文檔矩陣並找到它的SVD分解。我怎樣才能從這個分解中得到主題?發現主題的潛在語義分析
例如,在gensim:
topiC#0(332.762): 0.425*"utc" + 0.299*"talk" + 0.293*"page" + 0.226*"article" + 0.224*"delete" + 0.216*"discussion" + 0.205*"deletion" + 0.198*"should" + 0.146*"debate" + 0.132*"be"
topiC#1(201.852): 0.282*"link" + 0.209*"he" + 0.145*"com" + 0.139*"his" + -0.137*"page" + -0.118*"delete" + 0.114*"blacklist" + -0.108*"deletion" + -0.105*"discussion" + 0.100*"diff"
topiC#2(191.991): -0.565*"link" + -0.241*"com" + -0.238*"blacklist" + -0.202*"diff" + -0.193*"additions" + -0.182*"users" + -0.158*"coibot" + -0.136*"user" + 0.133*"he" + -0.130*"resolves"
感謝拉迪姆,gensim的開發商。讓我重述一下我的問題:係數0.425,0.299等的意義究竟是什麼?你如何計算他們從U,S,V? –