小编Ben*_*Lar的帖子

我相信的问题是如何输入CurrentDay.它以前创建为:

Transaction <- function(PnL, Day)
  results <- list(a = PnL, b = Day)
  return(results)

PnL和Day都是数值.

Day <- Transaction(PnL, Day)["b"]

Transaction返回列表,b是整数.

moving_avg <- function(StockData, MA, CurrentDay){
  #MA = Days long the MA is
  #CurrentDay = What day we are currently on
  MAValue <- NULL
  total <- 0
  start <- CurrentDay - MA
  for(i in 1:length(MA)) {
    total <- total + StockData[[start, 4]]
    start <- start + 1
  }
  MAValue <- total/MA
  return(MAValue)
}

有谁知道我收到此错误的原因？

CurrentDay中的错误 - MA:二元运算符的非数字参数