{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title":"人工智能与大数据技术导论","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787302517986","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","uuid":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title":"人工智能与大数据技术导论","normalized_title":"人工智能与大数据技术导论","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787302517986","isbns":["9787302517986"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":490,"navigation_url":"https://workshop.closeclaw.top/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title_url":"https://workshop.closeclaw.top/ai/title/%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD%E4%B8%8E%E5%A4%A7%E6%95%B0%E6%8D%AE%E6%8A%80%E6%9C%AF%E5%AF%BC%E8%AE%BA","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","page_url":"https://workshop.closeclaw.top/api/ai/books/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page","search_url":"https://workshop.closeclaw.top/api/ai/books/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/search"},"page":{"printed_page":344,"pdf_page":360,"physical_index":360,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"0028d4738687d072578da03dc3ee0fd5e3d9002aa433b190f9ac340bec7bbe89"},"chapter":"第10章","content":"人工智能与大数据技术导论\n\n结果如图10-40所示。\n\n$$\n\\begin{array} { r }  [ \\begin{array}  c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c \\end{array} \\end{array}\n$$\n\n图10-40 10000行数据执行结果\n\n如图10-40所示，第一列中包含类别标签。其余列中包含特征值，每个像素对应一个特征值，有28×28=784个像素值，其中大部分像素值为零。\n\n如图10-41所示，这些样本都是分辨率相对较低、对比度相对较高的手写数字图片。0\\~9十个数字中的每个可能出现的数字均由唯一的类别标签表示。因此，这是一个具有10个类别的多类别分类问题。现在，我们解析一下标签和特征，并查看几个样本（注意1oc的使用，借助loc，我们能够基于原来的位置抽出各列，因为此数据集中没有标题行）。\n\n$$\n\\begin{array} { r } { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\ { \\widetilde { \\mathbf { \\Gamma } } } \\\\  \\widetilde  \\mathbf  \\ \\end{array}\n$$\n\n图10-41 手写数字\n\n344","previous_page":343,"next_page":345}