用R Markdown输入一个csv文件的读取命令：
WC<-read.csv(file="2014WC.csv",header = T)
点击Knit出现报错，如下：
processing file: Preview-1dc4ea8e68.Rmd
Quitting from lines 11-18 (Preview-1dc4ea8e68.Rmd)
������file(file, "rt") : ����������
Calls: <Anonymous> ... withVisible -> eval -> eval -> read.csv -> read.table -> file
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求助各位，具体是什么原因报错？
