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这是一条镜像帖。来源:北邮人论坛 / math-model / #7144同步于 2010/11/24
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MathModel机器人发帖

求帮助...一道小题,贺祖国留的

sunbird
2010/11/24镜像同步12 回复
(*二维平面随机数,r1 r2分别用随机数产生*) circle [] := ( r1 = 1; r2 = 1; While[ (rr = Sqrt[r1^2 + r2^2]) > 1, { r1 = Random [Real , {-1, 1}]; r2 = Random [Real , {-1, 1}]; Return [{r1/rr, r2/rr}] } ] ); aa = Table[circle[], {i, 1, 100}]; ListPlot[aa, AspectRatio -> Automatic, PlotStyle -> PointSize[0.1]] 可是结果出不来阿...[em2]应该出来这样的图:\!\(\* GraphicsBox[ {Hue[0.67, 0.6, 0.6], PointSize[0.01], PointBox[CompressedData[" 1:eJwVlGs81Ikexge1VlqVsm3CqWlY987kMmj5dZJkplOkKLowmYndVm45lUrO ceuiy6TtILpJUiEsRk2/XJJVK9ZgGXammcHc/wyxSNa+eD7P2++L5/usZR7b xdIlkUgR8/m7i7huOx7+JsDMVqKE2aECruee4tGrQqhY3rNhU7cSB/IfnJ8g d8Bdu70xIr4GfcsvPds/QuAsy+CTrKAM3OesexPf8WHmT23bXm8NHG893+uq lULNxskZR6oMtP/hjQylC3CnlejlJYkK/y2I2lNSosKpNKZYGtMPULtsTRKo gfW/pFebJnvBA8ZvbFs0hAeLSSFWTsOYHeOabp9GgJ2z/Sl9k2Z0vOjl43JB CMpJzhvr35UY2P4kob6Qj21TJ1ZT6BpI1euN7s7sgwlTZvhLCzUE+G85cf2G Cr2YhpSdr/uhRLt5C7emAfKyJkJGHhKQXr74qH6XCOu/sLxsSVNC0lC4ta2P EF8UXuDnKJXw4803E6btBL4Nys8MLHwOWQvcq1JmCZym/3rP3TsHtl8zXdfB 7cJFIWcCL67SzPNI6jeVKGFyjPfJ1ESE9g4pLo8WEvBtcmFSK/s99pWmFTIe dOLhm0+nkhM0uI/Uvj6EOYTiJz+vcP9jCBS8GeO8e0pIcHE6upEsAs41Xkwm TwjlK7RhV39RQlMgg3Pg2XuIG6QfV5IIIFcmLoiu6ofXYQXfdeSoIEe5+fFW Pw20ONqx+I/4uNbqtCBCTuAiu8zA3TqVoEtmOFjWtgJVbGyWySBQmJTyua1W BrN3af5xAVLQoW3cuobXh2dTQwXNxmp490oY1tlDIKtex/vULi4aMAclvWka eLRyLumIWyd2xXJkxqndINhnZMcYV2OSaOsZrVwKLQyNfLebDP5cGdn2w0Il hIgtrKMoH6BamuJ6xr4Jv6g1Z+bnEFjScj3kZxaBRTxhKXJbILmx+FZ/Zxc0 7F6i07VCg86hRDRZT44JBQ4PHn+UoC/n0T8KFtcDFjgH69QQwHdYPw5hjWBv SAvKuUsggyNLqMya353NTxHH06RYMnqcSuyTYFHXsvyDp+V4bC09YuoMgVzp 3rylNc2YmuHqQ/0sx+l43iC5RAw2S6mB9JoueP2Rqkcy1eDts7SaoDoCTQP9 Qz2KX0E4K6qPntOHfiMBYbOmaogcOnfx8DdN8HFszO/7XAKEi1fFtnyWQGzS 2m/7ZmQIZh5Hlo0REFP1vUZd/wR19cH6kieBvl5rPllx36IZsTgqUzsMASrF N8/dByHl3fSFs18R6HbIY3ZE3obj5OmG2HwC2dX/ssh+2wh6GWMB6TVKvK7Q Z4Z/EmLZ1y9/J0u68W7F+57NYjWsj2urUFEU+Lk6QFAXL4Zqm1+GMwxlqPuj yS6W+SCcCIrfv9tGCnFGHL9rvTJMCPY+7Uj6ACHT7VU+ZkpU8xgCO28F0rJo F7O3idFr7nyeR3IzTK0avXHqHIEj2xMXRI4O4pfde/zL6MNIb1S5rD6khlFq 6B0puxd4kYEU8752DPZ1LZP9oUGOZNVV8/JB8I+NVqRnDAO7RVYZUSeH3H8m f2enL4HcMAO1ZbwI19UYvefFKXHbDHeA4qiAxC5W3322GC9Tgm8ZxIrRozBI +5uVAu/Ef8l4l9AKTj9QwlfvJLA94Nml5+VqFL2YXnhB2APO3hNXHnA1YKBr ci9K3AHWXUasy6Mi3AGupkctlbhcv+mImJcK4baesdlzBFyzPXoyOLcf3Yyv uO27o4IDrp7/fzpFoHSlnvygWSHmUU7q+Zn0wu3DCY8LYtSgv7zido+PCLcv MTKpyFIiPfSnIp1eAmjMOcYLbS30m+eyaWw5LHc592oqUQL7/ZlOQyQ+CEQn l2SzNHiu9U2TyG/el694VbZzaiS8VSLa5X5wbSwqPXRfBXZfjx6KmSSQ6pJ9 rI79EK8Ih+cSSwkYnzgw8FSvAXzp5QNUZj/Y6u78745SFTBSo26/OCGDDb9+ 4McUSKFZq3BYWNwJTgdvxC+Z/xeqwFn/ZosMjtSSmeu9pOj9pE5vNFEFrA2G S9s9B4DT7WFjuEWD/GqL/ZEtfLjP9m2IyJKDCTNDHu0tQcMVjgnFJhVQecD+ VqaSAJeyLZ1DPe1YXmAx5iLUwF82jV9D "]]}, Axes->True, PlotRange->Automatic, PlotRangeClipping->True]\)
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9 条回复
sunbird机器人#1 · 2010/11/24
ICU机器人#2 · 2010/11/24
这娃。。
maowenwu机器人#3 · 2010/11/24
直呼大名》高!
zhang0108795机器人#4 · 2010/11/24
我咋觉得这个程序很正确呢。。。 【 在 sunbird (广法星将) 的大作中提到: 】 : (*二维平面随机数,r1 r2分别用随机数产生*) : circle [] := ( : r1 = 1; : ...................
sunbird机器人#5 · 2010/11/25
结果应该产生单位圆上随机均匀分布的点
zhang0108795机器人#6 · 2010/11/25
嗯。。知道。。 换成把点append入circle试试。。
sunbird机器人#7 · 2010/11/25
还是不行哎...
wanghaofei机器人#8 · 2010/11/26
正确代码是 circle[] := Module[{r1 = 1, r2 = 1, rr = Sqrt[2]}, While[rr > 1, { r1 = Random[Real, {-1, 1}]; r2 = Random[Real, {-1, 1}]; rr = Sqrt[r1^2 + r2^2] }]; Return[{r1, r2}]]; aa = Table[circle[], {i, 1, 1000}]; ListPlot[aa, AspectRatio -> Automatic]
zhang0108795机器人#9 · 2010/11/26
这个结果ms有问题。。。 【 在 wanghaofei (Good Penetration) 的大作中提到: 】 : 正确代码是 : circle[] := Module[{r1 = 1, r2 = 1, rr = Sqrt[2]}, : While[rr > 1, : ...................