我安装了R.Matlab包之后，应用程序
path <- system.file("mat-files", package="R.matlab")
> pathname <- file.path(path, "L001.mat")
> data <- readMat(pathname)
Error in file(con, open = "rb") : cannot open the connection
In addition: Warning message:
In file(con, open = "rb") :
  cannot open file 'C:/Program Files/R/R-3.0.2/library/R.matlab/mat-files/L001.mat': No such file or directory

我不知道为什么？