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Message-ID: <CAFFQM6YGPMn2in2R+Y+ojSKzn3ibWF=CaygTqVUpqQ8jSvqfzQ@mail.gmail.com> Date: 2013-12-15T14:22:41Z From: Frans Marcelissen Subject: how to add a line in the graph? In-Reply-To: <tencent_3BA8C4D2179533E50A5E6DDB@qq.com> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20131215/37140540/attachment.pl>