在 R 中使用 tryCatch() 在循环中分配错误值 [英] using tryCatch() in R to assign error values in loop

问题描述

我正在为 R 中的 tryCatch() 指令苦苦挣扎.我正在尝试获取股票代码的收盘价.

I am struggling with the instructions for tryCatch() in R. I'm trying to capture the closing price for a ticker.

案例 2 = 好案例 = TickersJuly2 = 独特的价格与股票代码的关系

Case 2 = good case = TickersJuly2 = unique price to ticker relationship

情况 1 = 坏情况 = TickersJuly1 = FABU 收盘价是 CETX 的重复

Case 1 = bad case = TickersJuly1 = FABU close price is the repeat of CETX

案例 1 所需的输出是 0，表示 FABU.

Case 1 desired output is a 0 for FABU.

library(TTR)
close.price1=NULL
TickersJuly1 <- c('DIT','CETX','FABU')
TickersJuly2<- c('AAPL','A','AA')

for(i in TickersJuly1){
           tryCatch(close <- getYahooData(i,20150727,20150727,'daily',"price"),
               error = function(e) close$Close <- 0,
               warning = function(w) close$Close <- 0,
               finally = function(f) close$Close <- 0)
      close.price <- c(as.character(close$Close),i)
      close.price1 <- rbind(close.price1,close.price)
}

推荐答案

我认为这有效.您应该将 tryCatch 的结果分配给一个变量.

I think this works. You should be assigning the result of the tryCatch to a variable.

for(i in TickersJuly1){
    close <- tryCatch(
        getYahooData(i,20150727,20150727,'daily',"price"),
        error = function(e) list(Close=0),
        warning = function(w) list(Close=0),
        finally = function(f) list(Close=0))
    close.price <- c(as.character(close$Close),i)
    close.price1 <- rbind(close.price1,close.price)
}

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