{"id":2021,"date":"2023-07-24T01:29:42","date_gmt":"2023-07-24T01:29:42","guid":{"rendered":"https:\/\/statorials.org\/cn\/numpy-ndarray-%e5%af%b9%e8%b1%a1%e6%b2%a1%e6%9c%89%e5%b1%9e%e6%80%a7%e8%bf%bd%e5%8a%a0\/"},"modified":"2023-07-24T01:29:42","modified_gmt":"2023-07-24T01:29:42","slug":"numpy-ndarray-%e5%af%b9%e8%b1%a1%e6%b2%a1%e6%9c%89%e5%b1%9e%e6%80%a7%e8%bf%bd%e5%8a%a0","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/numpy-ndarray-%e5%af%b9%e8%b1%a1%e6%b2%a1%e6%9c%89%e5%b1%9e%e6%80%a7%e8%bf%bd%e5%8a%a0\/","title":{"rendered":"\u5982\u4f55\u4fee\u590d\uff1a\u201cnumpy.ndarray\u201d\u5bf9\u8c61\u6ca1\u6709\u201cappend\u201d\u5c5e\u6027"},"content":{"rendered":"

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\u4f7f\u7528 NumPy \u65f6\u53ef\u80fd\u9047\u5230\u7684\u9519\u8bef\u662f\uff1a<\/span><\/p>\n

 AttributeError: 'numpy.ndarray' object has no attribute 'append'\n<\/strong><\/pre>\n
\u5f53\u60a8\u5c1d\u8bd5\u4f7f\u7528\u6807\u51c6 Python append()<\/strong>\u51fd\u6570\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u503c\u9644\u52a0\u5230 NumPy \u6570\u7ec4\u7684\u672b\u5c3e\u65f6\uff0c\u4f1a\u53d1\u751f\u6b64\u9519\u8bef\u3002<\/span><\/p>\n
\u7531\u4e8e NumPy \u6ca1\u6709\u8ffd\u52a0\u5c5e\u6027\uff0c\u56e0\u6b64\u4f1a\u5f15\u53d1\u9519\u8bef\u3002\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u60a8\u5e94\u8be5\u4f7f\u7528np.append()<\/strong>\u4ee3\u66ff\u3002<\/span><\/p>\n
\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u7ea0\u6b63\u6b64\u9519\u8bef\u3002<\/span><\/p>\n
\u5982\u4f55\u91cd\u73b0\u9519\u8bef<\/strong><\/span><\/h3>\n
\u5047\u8bbe\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u6807\u51c6 Python append()<\/strong>\u51fd\u6570\u5c06\u65b0\u503c\u6dfb\u52a0\u5230 NumPy \u6570\u7ec4\u7684\u672b\u5c3e\uff1a<\/span><\/p>\n
 import<\/span> numpy as<\/span> np\n\n#define NumPy array\nx = np. array<\/span> ([1, 4, 4, 6, 7, 12, 13, 16, 19, 22, 23])\n\n#attempt to add the value '25' to end of NumPy array\n<\/span>x. append<\/span> (25)\n\n<\/span><\/span>AttributeError: 'numpy.ndarray' object has no attribute 'append'\n<\/strong><\/pre>\n
\u6211\u4eec\u6536\u5230\u9519\u8bef\uff0c\u56e0\u4e3a NumPy \u6ca1\u6709\u9644\u52a0\u5c5e\u6027\u3002<\/span><\/span><\/p>\n
\u5982\u4f55\u4fee\u590d\u9519\u8bef<\/strong><\/span><\/h3>\n
\u8981\u4fee\u590d\u6b64\u9519\u8bef\uff0c\u6211\u4eec\u53ea\u9700\u4f7f\u7528np.append()<\/strong>\u5373\u53ef\uff1a<\/span><\/p>\n
 import<\/span> numpy as<\/span> np\n\n#define NumPy array\nx = np. array<\/span> ([1, 4, 4, 6, 7, 12, 13, 16, 19, 22, 23])\n\n#append the value '25' to end of NumPy array\n<\/span>x = np. append<\/span> (x, 25)\n\n#view updated array<\/span>\nx\n\narray([ 1, 4, 4, 6, 7, 12, 13, 16, 19, 22, 23, 25])\n<\/span><\/span><\/strong><\/pre>\n
\u4f7f\u7528np.append()<\/strong>\u6211\u4eec\u6210\u529f\u5730\u5c06\u503c\u201c25\u201d\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\u3002<\/span><\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u8981\u5c06\u4e00\u4e2a NumPy \u6570\u7ec4\u6dfb\u52a0\u5230\u53e6\u4e00\u4e2a NumPy \u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u6700\u597d\u4f7f\u7528np.concatenate()<\/strong>\u51fd\u6570\uff1a<\/span><\/p>\n
 import<\/span> numpy as<\/span> np\n\n#define two NumPy arrays\n<\/span>a = np. array<\/span> ([1, 4, 4, 6, 7, 12, 13, 16, 19, 22, 23])\nb = np. array<\/span> ([25, 26, 26, 29])\n\n#concatenate two arrays together\n<\/span>c = np. concatenate<\/span> ((a, b))\n\n#view resulting array\n<\/span>vs\n\narray([ 1, 4, 4, 6, 7, 12, 13, 16, 19, 22, 23, 25, 26, 26, 29])\n<\/strong><\/span><\/pre>\n
\u6709\u5173\u6570\u7ec4\u548c\u4e32\u8054\u51fd\u6570\u7684\u8be6\u7ec6\u8bf4\u660e\uff0c\u8bf7\u53c2\u9605\u5728\u7ebf\u6587\u6863\uff1a<\/span><\/span><\/p>\n