https://blog.youkuaiyun.com/qth515zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/qth515/article/details/78226632https://blog.youkuaiyun.com/qth515/article/details/78226632qth515Fri, 13 Oct 2017 15:30:02 +0800https://blog.youkuaiyun.com/qth515/article/details/78221771https://blog.youkuaiyun.com/qth515/article/details/78221771qth515Fri, 13 Oct 2017 08:53:39 +0800 1 char and differen]]>https://blog.youkuaiyun.com/qth515/article/details/78216683https://blog.youkuaiyun.com/qth515/article/details/78216683qth515Thu, 12 Oct 2017 16:42:06 +0800https://blog.youkuaiyun.com/qth515/article/details/78060003https://blog.youkuaiyun.com/qth515/article/details/78060003qth515Fri, 22 Sep 2017 10:17:40 +0800https://blog.youkuaiyun.com/qth515/article/details/78054337https://blog.youkuaiyun.com/qth515/article/details/78054337qth515Thu, 21 Sep 2017 17:06:27 +0800https://blog.youkuaiyun.com/qth515/article/details/77965892https://blog.youkuaiyun.com/qth515/article/details/77965892qth515Wed, 13 Sep 2017 14:39:26 +0800https://blog.youkuaiyun.com/qth515/article/details/77929691https://blog.youkuaiyun.com/qth515/article/details/77929691qth515Mon, 11 Sep 2017 09:28:38 +0800https://blog.youkuaiyun.com/qth515/article/details/77890558https://blog.youkuaiyun.com/qth515/article/details/77890558qth515Fri, 08 Sep 2017 08:32:59 +0800https://blog.youkuaiyun.com/qth515/article/details/77861827https://blog.youkuaiyun.com/qth515/article/details/77861827qth515Wed, 06 Sep 2017 08:43:13 +0800https://blog.youkuaiyun.com/qth515/article/details/77833532https://blog.youkuaiyun.com/qth515/article/details/77833532qth515Mon, 04 Sep 2017 09:57:43 +0800>>add(2,]]>https://blog.youkuaiyun.com/qth515/article/details/77746242https://blog.youkuaiyun.com/qth515/article/details/77746242qth515Thu, 31 Aug 2017 14:36:44 +0800>> x = np.eye(3) >>> x array([[ 1., 0., 0.], [ 0., 1., 0.], [ 0., 0., 1.]]) >>> np.nonzero(x) (array([0, 1, 2]), array([0, 1, 2])) 返回的是一个2维元组，表示矩阵中非零元素的下标]]>https://blog.youkuaiyun.com/qth515/article/details/55504504https://blog.youkuaiyun.com/qth515/article/details/55504504qth515Fri, 17 Feb 2017 09:35:42 +0800https://blog.youkuaiyun.com/qth515/article/details/54601413https://blog.youkuaiyun.com/qth515/article/details/54601413qth515Wed, 18 Jan 2017 15:11:23 +0800https://blog.youkuaiyun.com/qth515/article/details/53997707https://blog.youkuaiyun.com/qth515/article/details/53997707qth515Tue, 03 Jan 2017 20:33:57 +0800