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Message-ID: <97c8246d0903121924p82a896en7fa95820611a1da4@mail.gmail.com> Date: 2009-03-13T02:24:22Z From: Sean Zhang Subject: Is there any difference between <- and = In-Reply-To: <20090312152918.6800@gmx.net> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20090312/5a67ec69/attachment-0002.pl>