(a)     Download and install tseries package.

(b)     Include tseries package as a library in your code.

(c)     Use get.hist.quote to download GOOG and BAIDU historical data.

(d)     Plot both time series in the same panel and add a legend to the plot.

为什么用get.hist.quote("www.finance.yahoo.com/q?s=bidu")会出现404 not found啊

ps:我是新手，还请大神多多请教。

急求！！！