就是在new file/R markdown之后提示安装安装包，但是此后出现下面的问题，不知道是什么情况：

Installing package into 'C:/Users/User/Documents/R/win-library/3.1'(as 'lib' is unspecified)'C:\Program' �����ڲ����ⲿ���Ҳ���ǿ����еij������������ļ���Warning messages:1: running command '"C:/Program Files/R/R-3.1.1/bin/i386/R" CMD INSTALL -l "C:\Users\User\Documents\R\win-library\3.1" "C:/Program Files/RStudio/R/packages/rmarkdown_0.2.68_d2474565b72d39ed83b32d3c92a2bb02f8ed03a5.tar.gz"' had status 1 2: In utils::install.packages("C:/Program Files/RStudio/R/packages/rmarkdown_0.2.68_d2474565b72d39ed83b32d3c92a2bb02f8ed03a5.tar.gz",  :  installation of package 'C:/Program Files/RStudio/R/packages/rmarkdown_0.2.68_d2474565b72d39ed83b32d3c92a2bb02f8ed03a5.tar.gz' had non-zero exit status