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Message-ID: <AANLkTimEGW4uqsZLsaE=QMXOT2uvj1R4pMtzC-sCpSdO@mail.gmail.com> Date: 2011-01-29T03:46:14Z From: Fernando Lima Subject: Problem in weighting standard deviations An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20110128/cb0b91e2/attachment.pl>