Thanks! That's about 2-3x faster. I wasn't familiar with stack/unstack. Now
I have another tool.
Cheers,
e.
----
*Eric Archer, Ph.D.*
Southwest Fisheries Science Center (NMFS/NOAA)
8901 La Jolla Shores Drive
La Jolla, CA 92037 USA
858-546-7121 (work)
858-546-7003 (FAX)
Marine Mammal Genetics Group: swfsc.noaa.gov/mmtd-mmgenetics
GitHub: github/ericarcher
&
Adjunct Professor, Marine Biology
Scripps Institution of Oceanography
University of California, San Diego
http://profiles.ucsd.edu/frederick.archer
"
*The universe doesn't care what you believe. The wonderful thing about
science is that it doesn't ask for your faith, it just asks for your
eyes.*" - Randall Munroe
"*Lighthouses are more helpful than churches.*"
- Benjamin Franklin
"*...but I'll take a GPS over either one.*"
- John C. "Craig" George
On Wed, Nov 23, 2016 at 11:11 AM, nachti [via R] <
ml-node+s789695n472677...@n4.nabble.com> wrote:
> Try this:
>
> t1 <- dt[, unlist(.SD), by = id]
> t(unstack(t1, form = V1 ~ id))
>
> (I think you get done with the colnames yourself ...)
>
> Cheers,
> ~g
>
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