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Update 04. 数组的创建.ipynb

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Some examples have been modified to make more sense
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Subranium
2021-11-21 08:57:06 +08:00
committed by GitHub
parent a7fccb7b81
commit 0c97e34320
1 changed files with 6 additions and 4 deletions
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IntroductionToNumpy/task01 数据类型及数组创建/04. 数组的创建.ipynb
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@@ -101,7 +101,7 @@
"x = np.array([[1, 1, 1], [1, 1, 1], [1, 1, 1]])\n",
"y = np.array(x)\n",
"z = np.asarray(x)\n",
"w = np.asarray(x, dtype=np.int)\n",
"w = np.asarray(x, dtype=np.float64)\n",
"x[1][2] = 2\n",
"print(x,type(x),x.dtype)\n",
"# [[1 1 1]\n",
@@ -119,9 +119,9 @@
"# [1 1 1]] <class 'numpy.ndarray'> int32\n",
"\n",
"print(w,type(w),w.dtype)\n",
"# [[1 1 1]\n",
"# [1 1 2]\n",
"# [1 1 1]] <class 'numpy.ndarray'> int32\n",
"# [[1. 1. 1.]\n",
"# [1. 1. 1.]\n",
"# [1. 1. 1.]] <class 'numpy.ndarray'> float64\n",
"```\n",
"\n",
"\n",
@@ -311,6 +311,7 @@
"- `diag()`函数：提取对角线或构造对角数组。\n",
"\n",
"```python\n",
"\\ k : int, optional 对角线的位置，大于零位于对角线上面，小于零则在下面。"
"def diag(v, k=0):\n",
"```\n",
"\n",
@@ -325,6 +326,7 @@
"# [6 7 8]]\n",
"print(np.diag(x)) # [0 4 8]\n",
"print(np.diag(x, k=1)) # [1 5]\n",
"print(np.diag(x, k=2)) # [2]\n",
"print(np.diag(x, k=-1)) # [3 7]\n",
"\n",
"v = [1, 3, 5, 7]\n",