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tkamishima/random_gift.ipynb Secret

Created June 21, 2017 22:08
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changes of variance by repeating a procedure that one random person gives to 1 unit to antother random person
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random_gift.ipynb
{
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{
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"metadata": {
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"source": [
"import numpy as np"
]
},
{
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"122.455706278 [ 104 3 82 15 -107 39 -92 -285 105 136]\n",
"124.694827479 [ 118 -24 94 7 -111 56 -104 -277 115 126]\n",
"125.581845822 [ 133 -38 92 0 -101 29 -86 -282 118 135]\n",
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"122.605056992 [ 161 -97 173 0 -101 41 -93 -231 87 60]\n",
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"120.856940223 [ 174 -120 158 -12 -118 16 -54 -212 76 92]\n",
"109.736958223 [ 158 -111 128 -3 -121 6 -29 -193 69 96]\n",
"115.050423728 [ 169 -91 102 -4 -149 13 -25 -208 107 86]\n",
"124.543165208 [ 171 -109 121 9 -152 4 -32 -227 123 92]\n",
"116.949561778 [ 157 -90 102 -8 -149 26 -31 -217 122 88]\n",
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"123.609061157 [ 175 -85 127 -6 -148 26 -39 -236 122 64]\n"
]
}
],
"source": [
"n = 10\n",
"a = np.zeros(n, dtype=int)\n",
"for j in range(100):\n",
" for i in range(1000):\n",
" a[np.random.randint(n)] += 1\n",
" a[np.random.randint(n)] -= 1\n",
" print(np.std(a), a)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
"metadata": {
"anaconda-cloud": {},
"kernelspec": {
"display_name": "Python [conda env:py3k]",
"language": "python",
"name": "conda-env-py3k-py"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.5.3"
}
},
"nbformat": 4,
"nbformat_minor": 2
}
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