library(reshape2)
?dcast
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Sent from my phone. Please excuse my brevity.
Henry <hcco...@lbl.gov> wrote:
>I know this is likely very simple. I want to change a matrix that was
>given
>to me not sorted by timestamp to sorted by timestamp. It was sorted
>by
>CRAH_Name. There are 264k records initially. The CRAH names start at
>11
>and go to 98 but there are a number of missing values (CRAH_Name),
>total
>approx. 50.
>
>A small example of the given matrix
>
>Time_Stamp Power CRAH_Name
>4/16/2012 00:00 3.4862 11
>4/16/2012 00:01 3.4862 11
>4/16/2012 00:02 3.61035 11
>4/16/2012 00:03 3.57215 11
>4/16/2012 00:04 3.6008 11
>4/16/2012 00:05 3.64855 11
>4/16/2012 00:06 3.64855 11
>4/16/2012 00:07 3.6008 11
>4/16/2012 00:08 3.639 11
>4/16/2012 00:09 3.6581 11
>4/16/2012 00:10 3.6963 11
>4/16/2012 00:00 2.618646 98 (timestamping starts over again at
>00:00)
>4/16/2012 00:01 2.195102 98
>4/16/2012 00:02 2.758223 98
>4/16/2012 00:03 2.796727 98
>4/16/2012 00:04 2.652337 98
>4/16/2012 00:05 2.233606 98
>4/16/2012 00:06 2.811166 98
>4/16/2012 00:07 2.690841 98
>4/16/2012 00:08 2.406874 98
>4/16/2012 00:09 2.811166 98
>4/16/2012 00:10 2.286549 98
>
>I want to transform into a dataframe that looks like this..
>CRAH Name 11 12
>13............ 98
>timestamp ..01 power value power value power value
>...........power value
>timestamp ..02 power value power value power value
>...........power value
>timestamp ..03 power value power value power value
>...........power value
>
>This is how I'm used to dealing with time series data.
>
>Thanks very much for any help. I would like to use standard R function
>if
>not too complicated.
>
>
>
>
>--
>View this message in context:
>http://r.789695.n4.nabble.com/Simple-matrix-transformation-question-tp4585044p4585044.html
>Sent from the R help mailing list archive at Nabble.com.
>
>______________________________________________
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
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