{"id":1093,"date":"2020-07-17T18:21:58","date_gmt":"2020-07-17T10:21:58","guid":{"rendered":"http:\/\/cnliutz.uicp.io\/?p=1093"},"modified":"2020-07-17T18:21:58","modified_gmt":"2020-07-17T10:21:58","slug":"python-numpy%e5%8c%85%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"http:\/\/g1n29wqq.ipyingshe.net:5347\/?p=1093","title":{"rendered":"python numpy\u5305\u4f7f\u7528\u65b9\u6cd5"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#numpy shiyong \n#np.array();np.empty();np.zeros();np.arange();np.where();np.linspace();np.logspace();np.random()\n#\u75af\u72c2\u7684\u6b63\u5f26\u66f2\u7ebf\nimport matplotlib.pyplot as plt\nimport numpy as np\nx=np.linspace(-5,5,256)\ny=np.sin(x**3)\n# print(x)\n# print(y)\nplt.plot(x,y,'X--')\nplt.show()\n#\u6b63\u6001\u5206\u5e03\u76f4\u65b9\u56fe\u548c\u5bc6\u5ea6\u51fd\u6570\u56fe\nnp.random.seed(12345)\nN=10000\nrandnormal=np.random.normal(size=N)\ncounts,bins,path=plt.hist(randnormal,bins=int(np.sqrt(N)),color=\"blue\")\nprint(counts,bins)   #\u9891\u6570\u548c\u5206\u7ec4\nprint(type(path))\nplt.show()\nsigma=1;mu=0\nnorm_dist=(1\/np.sqrt(2**np.pi))*np.exp(-((bins-mu)**2)\/2)\nplt.plot(bins,norm_dist,color=\"red\")\nplt.show()\n#\u9189\u6c49\u6b65\u6570\u7edf\u8ba1\nnp.random.seed(1234)\nstep=np.where(np.random.randint(0,2,10000)>0,1,-1)\nposiition=np.cumsum(step)\nplt.plot(np.arange(10000),posiition)\nplt.show()\n#\u4e8c\u9879\u5206\u5e03\u8d4c\u535a\u6848\u4f8b--9\u679a\u786c\u5e01\u6b63\u9762\u671d\u4e0a\u81f3\u5c115\u679a\u8f938\u5143\uff0c\u5426\u5219\u8d628\u5143\uff0c\u56fe\u793a10000\u6b21\u8f93\u8d62\u53d8\u5316,\u5f00\u59cb\u65f6\u624b\u4e2d\u67091000\u5143\nnp.random.seed(1234)\nbinormal=np.random.binomial(9,0.5,10000)\nmoney=np.zeros(10000)\nmoney&#91;0]=1000\nfor i in range(1,10000):\n    if binormal&#91;i]&lt;5:\n        money&#91;i]=money&#91;i-1]-8\n    else:\n        money&#91;i] = money&#91;i - 1] + 8\nplt.plot(np.arange(10000),money)\nplt.show()<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1093","post","type-post","status-publish","format-standard","hentry","category-2"],"_links":{"self":[{"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/1093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1093"}],"version-history":[{"count":1,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/1093\/revisions"}],"predecessor-version":[{"id":1094,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/1093\/revisions\/1094"}],"wp:attachment":[{"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1093"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/g1n29wqq.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}