我正在尝试使用以下代码从 MySQL 数据库中读取数据:
drv<-dbDriver("MySQL")
user<-'xxxx'
password<-'xxxx'
dbname<-'test'
con<-dbConnect(drv, user=user, password=password, dbname=dbname)
load.packages('quantmod')
tickers = 'Z (Dec 10)'
setDefaults(getSymbols,verbose=T,src='MySQL')
data <- new.env()
data = getSymbols(tickers, from = '2010-09-01', env = data, auto.assign = T)
这会产生以下错误:
> data = getSymbols(tickers, from = '2010-09-01', env = data, auto.assign = T)
Error in getSymbols.MySQL(Symbols = "Z (Dec 10)", env = <environment>, :
At least one connection argument ( ‘user’ ‘password’ ‘dbname’ ) is not set
我不明白为什么当我设置了 con 时,它不起作用。