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Message-ID: <7e14346a.13898.13c05107b02.Coremail.laomeng_3@163.com> Date: 2013-01-04T10:17:11Z From: meng Subject: a question about the computation of expression In-Reply-To: <6E8D8DFDE5FA5D4ABCB8508389D1BF88DAB8D6@SRVEXCHMBX.precheza.cz> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20130104/ecb4d494/attachment-0001.pl>