> new.environment <- new.env()
> getFX("HKD/USD",from="2015-01-01",to="2015-12-31",env=new.environment)
[1] "HKDUSD"
Warning message:
In getSymbols.oanda(Symbols = Currencies, from = from, to = to, :
Oanda only provides historical data for the past 180 days. Symbol: HKD/USD
为什么不显示呢?只能读取最近180天的吗?
还有如果想要各种货币对美元的汇率,应该怎样设置参数呢,要用正则表达式么



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