“`” \u53c2\u8003\u56de\u7b54\uff1a<\/p>\n
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\uff082\uff09lightgbm\u4f7f\u7528\u4e86\u57fa\u4e8ehistogram\u7684\u51b3\u7b56\u6811\u7b97\u6cd5\uff0c\u8fd9\u4e00\u70b9\u4e0d\u540c\u4e0exgboost\u4e2d\u7684 exact \u7b97\u6cd5\uff0chistogram\u7b97\u6cd5\u5728\u5185\u5b58\u548c\u8ba1\u7b97\u4ee3\u4ef7\u4e0a\u90fd\u6709\u4e0d\u5c0f\u4f18\u52bf\u30021\uff09\u5185\u5b58\u4e0a\u4f18\u52bf\uff1a\u5f88\u660e\u663e\uff0c\u76f4\u65b9\u56fe\u7b97\u6cd5\u7684\u5185\u5b58\u6d88\u8017\u4e3a(#data* #features * 1Bytes)(\u56e0\u4e3a\u5bf9\u7279\u5f81\u5206\u6876\u540e\u53ea\u9700\u4fdd\u5b58\u7279\u5f81\u79bb\u6563\u5316\u4e4b\u540e\u7684\u503c)\uff0c\u800cxgboost\u7684exact\u7b97\u6cd5\u5185\u5b58\u6d88\u8017\u4e3a\uff1a(2 * #data * #features* 4Bytes)\uff0c\u56e0\u4e3axgboost\u65e2\u8981\u4fdd\u5b58\u539f\u59cbfeature\u7684\u503c\uff0c\u4e5f\u8981\u4fdd\u5b58\u8fd9\u4e2a\u503c\u7684\u987a\u5e8f\u7d22\u5f15\uff0c\u8fd9\u4e9b\u503c\u9700\u898132\u4f4d\u7684\u6d6e\u70b9\u6570\u6765\u4fdd\u5b58\u30022\uff09\u8ba1\u7b97\u4e0a\u7684\u4f18\u52bf\uff0c\u9884\u6392\u5e8f\u7b97\u6cd5\u5728\u9009\u62e9\u597d\u5206\u88c2\u7279\u5f81\u8ba1\u7b97\u5206\u88c2\u6536\u76ca\u65f6\u9700\u8981\u904d\u5386\u6240\u6709\u6837\u672c\u7684\u7279\u5f81\u503c\uff0c\u65f6\u95f4\u4e3a(#data),\u800c\u76f4\u65b9\u56fe\u7b97\u6cd5\u53ea\u9700\u8981\u904d\u5386\u6876\u5c31\u884c\u4e86\uff0c\u65f6\u95f4\u4e3a(#bin)<\/p>\n
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\uff084\uff09lightgbm\u652f\u6301\u76f4\u63a5\u8f93\u5165categorical \u7684feature\uff0c\u5728\u5bf9\u79bb\u6563\u7279\u5f81\u5206\u88c2\u65f6\uff0c\u6bcf\u4e2a\u53d6\u503c\u90fd\u5f53\u4f5c\u4e00\u4e2a\u6876\uff0c\u5206\u88c2\u65f6\u7684\u589e\u76ca\u7b97\u7684\u662f\u201d\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2acategory\u201c\u7684gain\u3002\u7c7b\u4f3c\u4e8eone-hot\u7f16\u7801\u3002<\/p>\n
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\u00a0<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u53c2\u8003\u56de\u7b54\uff1a \uff081\uff09xgboost\u91c7\u7528\u7684\u662flevel-wise\u7684\u5206\u88c2\u7b56\u7565\uff0c\u800cli […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-45043","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45043","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=45043"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45043\/revisions"}],"predecessor-version":[{"id":45044,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45043\/revisions\/45044"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=45043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=45043"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=45043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}