我想要做的事情相當簡單,但我一直無法弄清楚。我以爲我可以做類似的概述hereadjustOHLC - 需要解決方案來循環傳遞字符的字符向量
我有一個字符向量的tickers是由getSymbols
返回的xts OHLC對象。我想遍歷符號每個股票和符號傳遞給adjustOHLC
調整爲分裂:
symbols = c("FCX", "SPY")
for(symbol in symbols){
return(adjustOHLC(symbol,adjust =c("split"), use.Adjusted=FALSE))
}
看來adjustOHLC
不搶變量「符號」的價值:
debug: div <- getDividends(symbol.name)
Browse[2]> symbol.name
[1] "symbol"
Browse[2]>
Error in download.file(paste(yahoo.URL, Symbol.name, "&a=", from.m, "&b=", :
cannot open URL 'http://ichart.finance.yahoo.com/table.csv?s=symbol&a=0&b=01&c=1970&d=3&e=14&f=2012&g=v&ignore=.csv'
In addition: Warning message:
In download.file(paste(yahoo.URL, Symbol.name, "&a=", from.m, "&b=", :
cannot open: HTTP status was '404 Not Found'
如果我使用get(symbols)
,我會得到相同的結果(類似的方法用於本文頂部的鏈接中):
for(symbol in symbols){
return(adjustOHLC(get(symbol),adjust =c("split"), use.Adjusted=FALSE))
}
debug: div <- getDividends(symbol.name)
Browse[2]> symbol.name
[1] "get(symbol)"
Browse[2]>
Error in download.file(paste(yahoo.URL, Symbol.name, "&a=", from.m, "&b=", :
cannot open URL 'http://ichart.finance.yahoo.com/table.csv?s=get(symbol)&a=0&b=01&c=1970&d=3&e=14&f=2012&g=v&ignore=.csv'
In addition: Warning message:
In download.file(paste(yahoo.URL, Symbol.name, "&a=", from.m, "&b=", :
cannot open: HTTP status was '404 Not Found'
我以爲我也可以利用lapply
來提高速度,但是我認爲我先遇到了上述問題。
lapply(symbols, function(x) adjustOHLC(x, adjust=c("split"), use.Adjusted=FALSE))
似乎很容易 - 我道歉,如果這是那麼微不足道。感謝幫助。