分配字母等級來testscores在一個表中的R

classlist = read.table("classlist.txt", sep="\t", header=T) 
classlist 
Testscore <- runif(35,60,100) 
classlist$Testscore <- Testscore 
classlist 
classlist$Grade <- function(Testscore) { 
if(Testscore>=95){ 
     grade = "A"`enter code here` 
     } else if(Testscore>=90 & Testscore<95){ 
      grade = "A-" 
     } else if(Testscore>=85 & Testscore<90){ 
     grade = "B+" 
     } else if(Testscore>=80 & Testscore<85){ 
     grade = "B" 
     } else if(Testscore>=75 & Testscore<80){ 
     grade = "B-" 
     } else {grade = "C"} 
    }

我要分配相應的等級在表中的列級有進口當我嘗試此代碼提到了以下錯誤：分配字母等級來testscores在一個表中的R

Error in rep(value, length.out = nrows) : 
    attempt to replicate an object of type 'closure'

來源

2015-09-27 krithika krishnan

文檔這可以幫助你 http://stackoverflow.com/questions/17685502/in-r-getting-the-following-error-attempt-to-replicate-an-object-of- type-clos – Ars

您正在爲'classlist $ Grade'分配一個函數。爲了你的代碼的工作，你應該首先創建函數myfunc < - function（Testscore）{...}'然後應用它'classlist $ Grade < - myfunc（classlist $ Testscore）' – scoa

試試這個：R中拇指

set.seed(1) # for reproducible example 
classlist  <- data.frame(scores=runif(35,60,100)) 
classlist$grades <- cut(classlist$scores, 
         breaks=c(0,seq(75,100,by=5)), 
         labels=c("C","B-","B","B+","A-","A")) 
head(classlist,10) 
#  scores grades 
# 1 70.62035  C 
# 2 74.88496  C 
# 3 82.91413  B 
# 4 96.32831  A 
# 5 68.06728  C 
# 6 95.93559  A 
# 7 97.78701  A 
# 8 86.43191  B+ 
# 9 85.16456  B+ 
# 10 62.47145  C

好規則：當你有if之類的語句，一個字符串，有幾乎總是一個更好的辦法。閱讀關於cut(...)

來源

2015-09-27 06:04:08 jlhoward

分配字母等級來testscores在一個表中的R

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