{"id":204,"date":"2024-01-31T04:48:03","date_gmt":"2023-07-15T10:31:59","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8pytorch%e7%9a%84torch-max%e5%87%bd%e6%95%b0%ef%bc%9f\/"},"modified":"2025-08-01T02:20:51","modified_gmt":"2025-07-31T18:20:51","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8pytorch%e7%9a%84torch-max%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8pytorch%e7%9a%84torch-max%e5%87%bd%e6%95%b0%ef%bc%9f\/","title":{"rendered":"PyTorch\u6df1\u5ea6\u89e3\u6790\uff1atorch.max()\u51fd\u6570\u7684\u9ad8\u6548\u4f7f\u7528\u6307\u5357"},"content":{"rendered":"<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u4f7f\u7528PyTorch\u7684<code>torch.max()<\/code>\u51fd\u6570\u3002<\/p>\n<p>\u6b63\u5982\u60a8\u6240\u9884\u671f\u7684\uff0c\u8fd9\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u4e14\u7528\u9014\u5e7f\u6cdb\u7684\u51fd\u6570\uff0c\u5176\u590d\u6742\u6027\u53ef\u80fd\u8d85\u51fa\u60a8\u7684\u521d\u6b65\u60f3\u8c61\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u7cfb\u5217\u7b80\u5355\u6613\u61c2\u7684\u793a\u4f8b\uff0c\u8be6\u7ec6\u89e3\u6790\u5176\u7528\u6cd5\u3002<\/p>\n<p>\u672c\u6587\u5185\u5bb9\u57fa\u4e8ePyTorch 1.5.0\u7248\u672c\u7f16\u5199\u3002<\/p>\n<hr>\n<h2>PyTorch\u4e2d<code>torch.max()<\/code>\u7684\u57fa\u672c\u8bed\u6cd5<\/h2>\n<p>\u8981\u4f7f\u7528PyTorch\u7684<code>torch.max()<\/code>\u51fd\u6570\uff0c\u9996\u5148\u9700\u8981\u5bfc\u5165<code>torch<\/code>\u5e93\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> torch\r\n<\/code><\/pre>\n<p>\u6b64\u51fd\u6570\u7528\u4e8e\u8fd4\u56de\u5f20\u91cf\u4e2d\u7684\u6700\u5927\u503c\u3002<\/p>\n<h3>PyTorch <code>torch.max()<\/code>\u51fd\u6570\u7684\u9ed8\u8ba4\u884c\u4e3a\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c<code>torch.max()<\/code>\u51fd\u6570\u4f1a\u8fd4\u56de\u5f20\u91cf\u4e2d\u7684\u5168\u5c40\u6700\u5927\u5143\u7d20\u53ca\u5176\u5bf9\u5e94\u7684\u7d22\u5f15\uff08\u5982\u679c\u9700\u8981\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>max_element <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>input_tensor<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5177\u4f53\u793a\u4f8b\uff1a<\/p>\n<pre class=\"post-pre\"><code>p <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span>randn<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span>\r\nmax_element <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>max_element<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>tensor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">[<\/span><span class=\"token operator\">-<\/span><span class=\"token number\">0.0665<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">2.7976<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">0.9753<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span>\r\n        <span class=\"token punctuation\">[<\/span> <span class=\"token number\">0.0688<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">-<\/span><span class=\"token number\">1.0376<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">1.4443<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>\r\ntensor<span class=\"token punctuation\">(<\/span><span class=\"token number\">2.7976<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u786e\u5b9e\u8fd4\u56de\u4e86\u5f20\u91cf\u4e2d\u7684\u5168\u5c40\u6700\u5927\u5143\u7d20\uff01<\/p>\n<hr>\n<h3>\u5728\u7279\u5b9a\u7ef4\u5ea6\u4e0a\u4f7f\u7528<code>torch.max()<\/code><\/h3>\n<p>\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u5728\u5f20\u91cf\u7684\u7279\u5b9a\u7ef4\u5ea6\uff08\u7c7b\u4f3c\u4e8eNumPy\u4e2d\u7684\u8f74\uff09\u4e0a\u83b7\u53d6\u6700\u5927\u503c\uff0c\u800c\u4e0d\u662f\u4ec5\u4ec5\u5f97\u5230\u4e00\u4e2a\u5355\u4e00\u7684\u5168\u5c40\u6700\u5927\u5143\u7d20\u3002<\/p>\n<p>\u4e3a\u6b64\uff0c<code>torch.max()<\/code>\u63d0\u4f9b\u4e86\u4e00\u4e2a\u53ef\u9009\u7684\u5173\u952e\u5b57\u53c2\u6570<code>dim<\/code>\uff0c\u7528\u4e8e\u6307\u5b9a\u6211\u4eec\u5e0c\u671b\u67e5\u627e\u6700\u5927\u503c\u7684\u65b9\u5411\u3002<\/p>\n<p>\u5f53\u6307\u5b9a<code>dim<\/code>\u53c2\u6570\u65f6\uff0c\u8be5\u51fd\u6570\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5143\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u4e24\u4e2a\u5f20\u91cf\uff1a<\/p>\n<ul class=\"post-ul\">\n<li><code>max_elements<\/code>\uff1a\u6cbf\u6307\u5b9a\u7ef4\u5ea6\u627e\u5230\u7684\u6240\u6709\u6700\u5927\u5143\u7d20\u3002<\/li>\n<li><code>max_indices<\/code>\uff1a\u4e0e\u8fd9\u4e9b\u6700\u5927\u5143\u7d20\u5bf9\u5e94\u7684\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>max_elements<span class=\"token punctuation\">,<\/span> max_indices <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>input_tensor<span class=\"token punctuation\">,<\/span> dim<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u65b0\u5f20\u91cf\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5728\u6307\u5b9a<code>dim<\/code>\u7ef4\u5ea6\u4e0a\u7684\u6700\u5927\u5143\u7d20\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e9b\u4f8b\u5b50\u6765\u5177\u4f53\u4e86\u89e3\u3002<\/p>\n<pre class=\"post-pre\"><code>p <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span>randn<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># \u83b7\u53d6\u6cbf dim = 0\uff08\u8f74 = 0\uff09\u7684\u6700\u5927\u503c<\/span>\r\nmax_elements<span class=\"token punctuation\">,<\/span> max_idxs <span class=\"token operator\">=<\/span> torch<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">,<\/span> dim<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>max_elements<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>max_idxs<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>tensor([[-0.0665,  2.7976,  0.9753],\r\n        [ 0.0688, -1.0376,  1.4443]])\r\ntensor([0.0688, 2.7976, 1.4443])\r\ntensor([1, 0, 1])\r\n<\/code><\/pre>\n<p>\u6b63\u5982\u60a8\u6240\u770b\u5230\u7684\uff0c\u6211\u4eec\u6cbf\u7740\u7ef4\u5ea60\uff08\u5373\u6cbf\u7740\u5217\uff09\u627e\u5230\u4e86\u6700\u5927\u503c\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u83b7\u53d6\u4e86\u4e0e\u6700\u5927\u503c\u5bf9\u5e94\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5728\u7b2c0\u5217\u4e2d\uff0c0.0688\u7684\u7d22\u5f15\u662f1\u3002<\/p>\n<p>\u7c7b\u4f3c\u5730\uff0c\u5982\u679c\u60a8\u60f3\u5728\u884c\u4e0a\u627e\u5230\u6700\u5927\u503c\uff0c\u8bf7\u4f7f\u7528<code>dim=1<\/code>\u3002<\/p>\n<pre class=\"post-pre\"><code># \u6cbf\u7740\u7ef4\u5ea61\uff08\u5373\u6cbf\u7740\u884c\uff09\u83b7\u53d6\u6700\u5927\u503c\r\nmax_elements, max_idxs = torch.max(p, dim=1)\r\nprint(max_elements)\r\nprint(max_idxs)\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>tensor([2.7976, 1.4443])\r\ntensor([1, 2])\r\n<\/code><\/pre>\n<p>\u786e\u5b9e\uff0c\u6211\u4eec\u6210\u529f\u83b7\u53d6\u4e86\u884c\u4e2d\u7684\u6700\u5927\u5143\u7d20\u53ca\u5176\u5bf9\u5e94\u7684\u7d22\u5f15\u3002<\/p>\n<hr>\n<h2>\u4f7f\u7528<code>torch.max()<\/code>\u8fdb\u884c\u5f20\u91cf\u6bd4\u8f83<\/h2>\n<p>\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>torch.max()<\/code>\u6765\u83b7\u53d6\u4e24\u4e2a\u5f20\u91cf\u4e4b\u95f4\u7684\u6700\u5927\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code>output_tensor = torch.max(a, b)\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u5f20\u91cf<code>a<\/code>\u548c<code>b<\/code>\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u7ef4\u5ea6\uff0c\u6216\u8005\u5b83\u4eec\u5fc5\u987b\u662f\u53ef\u5e7f\u64ad\u7684\u5f20\u91cf\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u5177\u6709\u76f8\u540c\u7ef4\u5ea6\u7684\u5f20\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code>p = torch.randn([2, 3])\r\nq = torch.randn([2, 3])\r\n\r\nprint(\"p =\", p)\r\nprint(\"q =\", q)\r\n\r\n# \u6bd4\u8f83p\u548cq\u7684\u5143\u7d20\u5e76\u83b7\u53d6\u6700\u5927\u503c\r\nmax_elements = torch.max(p, q)\r\n\r\nprint(max_elements)\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>p = tensor([[-0.0665,  2.7976,  0.9753],\r\n        [ 0.0688, -1.0376,  1.4443]])\r\nq = tensor([[-0.0678,  0.2042,  0.8254],\r\n        [-0.1530,  0.0581, -0.3694]])\r\ntensor([[-0.0665,  2.7976,  0.9753],\r\n        [ 0.0688,  0.0581,  1.4443]])\r\n<\/code><\/pre>\n<p>\u786e\u5b9e\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u5728\u5f20\u91cfp\u548cq\u4e4b\u95f4\u5177\u6709\u6700\u5927\u5143\u7d20\u7684\u8f93\u51fa\u5f20\u91cf\u3002<\/p>\n<hr>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86\u5982\u4f55\u4f7f\u7528<code>torch.max()<\/code>\u51fd\u6570\u6765\u627e\u51fa\u5f20\u91cf\u4e2d\u7684\u6700\u5927\u5143\u7d20\u3002<\/p>\n<p>\u6211\u4eec\u8fd8\u4f7f\u7528\u4e86\u8fd9\u4e2a\u51fd\u6570\u6765\u6bd4\u8f83\u4e24\u4e2a\u5f20\u91cf\u5e76\u5f97\u5230\u5b83\u4eec\u4e4b\u95f4\u7684\u6700\u5927\u503c\u3002<\/p>\n<p>\u5982\u9700\u9605\u8bfb\u7c7b\u4f3c\u6587\u7ae0\uff0c\u8bf7\u67e5\u9605\u6211\u4eec\u7684PyTorch\u6559\u7a0b\uff01\u656c\u8bf7\u5173\u6ce8\u66f4\u591a\u7cbe\u5f69\u5185\u5bb9\uff01<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li><a href=\"https:\/\/pytorch.org\/docs\/stable\/generated\/torch.max.html\" target=\"_blank\" rel=\"noopener\">PyTorch\u5b98\u65b9\u6587\u6863\u5173\u4e8etorch.max()<\/a><\/li>\n<\/ul>\n<hr>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u4f7f\u7528PyTorch\u7684torch.max()\u51fd\u6570\u3002 \u6b63\u5982\u60a8\u6240\u9884\u671f\u7684\uff0c\u8fd9\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[32,803,804,805,466],"class_list":["post-204","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-python","tag-pytorch","tag-torch-max","tag-805","tag-466"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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