Created
March 13, 2015 14:11
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A Slicing Notebook
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{ | |
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"input": [ | |
"import numpy as np" | |
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"language": "python", | |
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{ | |
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"input": [ | |
"x = np.linspace(0,10,50)\n", | |
"x" | |
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"array([ 0. , 0.20408163, 0.40816327, 0.6122449 ,\n", | |
" 0.81632653, 1.02040816, 1.2244898 , 1.42857143,\n", | |
" 1.63265306, 1.83673469, 2.04081633, 2.24489796,\n", | |
" 2.44897959, 2.65306122, 2.85714286, 3.06122449,\n", | |
" 3.26530612, 3.46938776, 3.67346939, 3.87755102,\n", | |
" 4.08163265, 4.28571429, 4.48979592, 4.69387755,\n", | |
" 4.89795918, 5.10204082, 5.30612245, 5.51020408,\n", | |
" 5.71428571, 5.91836735, 6.12244898, 6.32653061,\n", | |
" 6.53061224, 6.73469388, 6.93877551, 7.14285714,\n", | |
" 7.34693878, 7.55102041, 7.75510204, 7.95918367,\n", | |
" 8.16326531, 8.36734694, 8.57142857, 8.7755102 ,\n", | |
" 8.97959184, 9.18367347, 9.3877551 , 9.59183673,\n", | |
" 9.79591837, 10. ])" | |
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"x[0:5]" | |
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{ | |
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"array([ 0. , 0.20408163, 0.40816327, 0.6122449 , 0.81632653])" | |
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"starts = np.array([0,10,21])\n", | |
"length = 5\n", | |
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"pairs = np.vstack([starts, ends]).T\n", | |
"ranges = np.apply_along_axis(lambda p: np.arange(*p), 1, pairs)\n", | |
"ranges" | |
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"language": "python", | |
"metadata": {}, | |
"outputs": [ | |
{ | |
"metadata": {}, | |
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"text": [ | |
"array([[ 0, 1, 2, 3, 4],\n", | |
" [10, 11, 12, 13, 14],\n", | |
" [21, 22, 23, 24, 25]])" | |
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{ | |
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"input": [ | |
"x[ranges]" | |
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{ | |
"metadata": {}, | |
"output_type": "pyout", | |
"prompt_number": 5, | |
"text": [ | |
"array([[ 0. , 0.20408163, 0.40816327, 0.6122449 , 0.81632653],\n", | |
" [ 2.04081633, 2.24489796, 2.44897959, 2.65306122, 2.85714286],\n", | |
" [ 4.28571429, 4.48979592, 4.69387755, 4.89795918, 5.10204082]])" | |
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} | |
], | |
"prompt_number": 5 | |
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{ | |
"cell_type": "code", | |
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"input": [], | |
"language": "python", | |
"metadata": {}, | |
"outputs": [], | |
"prompt_number": 5 | |
} | |
], | |
"metadata": {} | |
} | |
] | |
} |
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