[R] reshape direction=wide

Thomas Lumley tlumley at u.washington.edu
Thu Feb 19 20:06:19 CET 2004

On Thu, 19 Feb 2004, Hanke, Alex wrote:

> v.names=c("var1","var2") creates a separate column for each combination of
> variables in v.names and level of variable identified by timevar.

yes, but that's not what he actually wants.

He needs to create a new id variable that combines ID and BID first



> I am reshaping a data.frame bids --> reshaped as shown below.
> I thought this should be possible with a single invocation of
> reshape, but the only way I came up with is reshaping subsets for each
> keyword and then joining them together. Does anyone have an idea how to
> solve this in a more elegant way? Efficiency is a concern as the datasets
> are very large.
> Is there a way to specify multiple v.names?
> Alex Hanke
> Department of Fisheries and Oceans
> St. Andrews Biological Station
> 531 Brandy Cove Road
> St. Andrews, NB
> Canada
> E5B 2L9
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Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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