> From: Hasan Diwan <hasan.diwan@gmail.com>
> To: R Project Help <r-help@r-project.org>
> Date: 01/27/2012 10:47 AM
> Subject: [R] PosixCT subsecond accuracy
> Sent by: r-help-bounces@r-project.org
> 
> The first column is epoch time. I read that POSIXct has support for
> this, sort of[1]. So, I tried:
> > sensor[,1] <- as.POSIXct(sensor[,1]/1000, origin='1970-01-01 
12:00:00')
> > head(sensor)
>             logged_on    accx   accy   accz compassx  compassy
> compassz      gyrox      gyroy      gyroz
> 1 2012-01-15 05:17:08 -0.4602 0.8346 0.0936 0.145508 -0.350586
> 0.259766  59.617390  28.521740  59.617390
> 2 2012-01-15 05:17:08 -0.4212 1.0452 0.1326 0.219727 -0.321289
> 0.241211  88.695656  27.478260  88.695656
> 3 2012-01-15 05:17:08 -0.2496 1.3416 0.2886 0.214844 -0.326172
> 0.141602  29.565218 -14.747826  29.565218
> 4 2012-01-15 05:17:08 -0.3276 1.0374 0.0546 0.261719 -0.314453
> 0.243164   8.765218  16.556522   8.765218
> 5 2012-01-15 05:17:08 -0.3588 1.0686 0.2418 0.229492 -0.307617
> 0.212891 -33.808697  35.756523 -33.808697
> 6 2012-01-15 05:17:08 -0.3120 1.0686 0.2652 0.261719 -0.289062
> 0.246094 -40.347828  24.626087 -40.347828
> 
> But now the fractional seconds are missing... Help? -- H

?options, look for digits.secs, and probably set it to 3, but careful of 
the character representation of those stamps.  See David's helpful work 
around of 24 January at 
http://r.789695.n4.nabble.com/POSIXct-value-display-incorrect-for-some-values-td4311446.html


-- 
Curt Seeliger, Data Ranger
Raytheon Information Services - Contractor to ORD
seeliger.curt@epa.gov
541/754-4638


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