[Bayes] Point --> Line: Estimate "π" by R

时间 2019-11-18

标签 bayes point line estimate 栏目 Java开源繁體版

原文原文链接

“半个数学系 + 一个计算机科学系 = Deep Learning初级班”spa

simulation = function(sampleSize){ c = rep(0,sampleSize)　　// <-- 分配了空间 countIn = 0 for(i in 1:sampleSize){ x = runif(1,-1,1) y = runif(1,-1,1) if(sqrt(x*x + y*y) <= 1){ countIn = countIn + 1 } piHat = (countIn / i) * 4 c[i] = piHat } return(c) } sampleSize = 1000 res = simulation(sampleSize)

/* res: 存储着全部的点 */
 plot(res[1:sampleSize], type = 'l')　　// 画点连成的线 lines(rep(pi, sampleSize)[1:sampleSize], col = 'red') // 画PI，参考线

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