hi there, I came across a problem when use the R console, it cannot produce plot graphic result after run the R command with no error message even no warning message. only one file named Rplots.pdf produced but the size of this file is 0 b, in other words, there is nothing in this file. my operation system is centos7 and the version of R is 3.2.3 . so, is there anybody can help me to solve this problem, I appreciate it.