替换R函数中的循环 [英] Replace Loops in R function

问题描述

我是R的新手，我在弄清楚如何替换下面函数中的FOR循环时遇到麻烦.该函数估计总体平均值.任何帮助将不胜感激.谢谢！

I'm new to R, and I'm having trouble figuring out how to replace the FOR loop in the function below. The function estimates a population mean. Any help at all would be much appreciated. Thank you!

 myFunc<- function(){


myFRAME <- read.csv(file="2008short.csv",head=TRUE,sep=",")

meanTotal <- 0

for(i in 1:100)
{

mySample <- sample(myFRAME$TaxiIn, 100, replace = TRUE)

tempMean <- mean(mySample)

meanTotal <- meanTotal + tempMean


}

cat("Estimated Mean: ", meanTotal/100, "\n") #print result

}

推荐答案

正如罗布(Rob)所建议的那样，您的循环是不必要的，但从本质上讲，"replicate()" 函数可以直接替换您的for循环.像这样:

As Rob suggests your loop is unnecessary, but in the spirit of the question the 'replicate()' function can directly replace your for loop. Like so:

   myFunc <- function(){
      myFRAME <- read.csv(file="2008short.csv",head=TRUE,sep=",")
      meanTotal <- <- mean(replicate(100,mean(sample(myFRAME$TaxiIn,100,T))))
      cat("Estimated Mean: ", meanTotal, "\n")
    }

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