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Hi, there. I am trying to read a file into R, but I got following message Error in file(file, "r") : unable to open connection In addition: Warning message: cannot open file `SwirlSample.txt' . In fact, my file has been already in the current working directory. My R is running on window operation system instead of UNIX. Thanks. Shizhu Zang Department of Biochemsitry Peking University Beijing China --------------------------------- 150ÍòÇúMP3·è¿ñËÑ£¬´øÄú´³ÈëÒôÀÖµîÌà Ã...