[Rd] rowsum

From: Terry Therneau <therneau_at_mayo.edu>
Date: Tue, 29 Mar 2011 07:56:35 -0500

> with the entirely different rowSums, but it has been around
> for a long time.)
    A lot longer than rowSums ...
> Bill Dunlap
> Spotfire, TIBCO Software
      This made me smile. The rowsums function was originally an internal     part of the survival package, used for fast computation of certain sums     when there is a cluster() statement. It was Statistical Sciences     (S-Plus) who moved it to global status. That is, they used it in enough     other places that they decided to speed it up, took over the     maintainance and ownership of the function (with my blessing), and     ceased to label it as part of "survival" in the manual.       This "metabug" can't be laid at R's feet.     Terry Therneau

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