Re: [R] Aggregating 15 minute xts sequence to hourly

__ *Costas Vorlow http://www.gravatar.com/avatar/49a9dee59073b1ed4a36440a06aeb81b * *http://www.linkedin.com/in/costasvorlow http://www.linkedin.com/in/costasvorlow* *http://www.vorlow.com* http://www.vorlow.com ▇ ▅ █ ▅ ▇ ▂ ▃ ▁ â

[R] Aggregating 15 minute xts sequence to hourly

__ *Costas Vorlow http://www.gravatar.com/avatar/49a9dee59073b1ed4a36440a06aeb81b * *http://www.linkedin.com/in/costasvorlow http://www.linkedin.com/in/costasvorlow* *http://www.vorlow.com* http://www.vorlow.com ▇ ▅ █ ▅ ▇ ▂ ▃ ▁ ▁ ▅ ▃ ▅ ▅ ▄ ▅ ▇ ▅ █ ▅ ▇ â

Re: [R] Aggregating 15 minute xts sequence to hourly

... __ *Costas Vorlow http://www.gravatar.com/avatar/49a9dee59073b1ed4a36440a06aeb81b * *http://www.linkedin.com/in/costasvorlow http://www.linkedin.com/in/costasvorlow* *http://www.vorlow.com* http://www.vorlow.com ▇ ▅ █ ▅ ▇ ▂ ▃ ▁ ▁ ▅ ▃ ▅ ▅ ▄ ▅ ▇ ▅ █ ▅ ▇ ▂ ▃ â

[R] Collapsing data.frame to its or xts

Hello, I have a data.frame of a time series sampled every 15 minutes. Also the data are in reverse order (recent to older). It looks like the following: Date 0:00 0:15 0:30 0:45 1:00 1:15 1:30 1:45 2:00 2:15 2:30 2:45 3:00 3:15 3:30 3:45 4:00 4:15 4:30 4:45 5:00 5:15 5:30 5:45 6:00 6:15 6:30

[R] R command execution at specific time from within R

Hello, I am trying to write a code that executes an R command at specific time intervals. É want R to do that instead of the operating system. Any help/pointer extremely welcome. Thanks in advance, Costas [[alternative HTML version deleted]]

[R] hhmm time format, strptime and %k

Hello, I am having trouble with the conversion specifications as described in the strptime help page. head(dat) Date Time Open HighLow Close UpDown Volume 1 11/19/2012 935 137.89 138.06 137.82 138.05 3202541 3013215 0 2 11/19/2012 940 138.04 138.40 138.02

[R] RGoogleTrends vs Google

the same problems? Best, Costas -- __ *Costas Vorlow * *http://www.linkedin.com/in/costasvorlow* *http://www.vorlow.com* http://www.vorlow.com * * [[alternative HTML version deleted

[R] Vectorization instead of loops problem

Hello, I am having problems vectorizing the following (i/o using a for/next/while loop): I have 2 sequences such as: x, y 1, 30 2, -40 0, 50 0, 25 1, -5 2, -10 1, 5 0, 40 etc etc The first sequence (x) takes integer numbers only: 0, 1, 2 The sequence y can be anything... I want to be able to

Re: [R] Vectorization instead of loops problem

Thanks Uwe. What happens if these are zoo (or time series) sequences/dataframes? \ I think your solution would apply as well, no? Thanks again best wishes, Costas 2011/12/4 Uwe Ligges lig...@statistik.tu-dortmund.de On 04.12.2011 16:18, Costas Vorlow wrote: Hello, I am having problems

Re: [R] Vectorization instead of loops problem

English is only one of several languages in which they can communicate. The problem is poor thinking, not poor English. Best, Bert On Sun, Dec 4, 2011 at 7:18 AM, Costas Vorlow costas.vor...@gmail.com wrote: Hello, I am having problems vectorizing the following (i/o using a for/next/while

[R] tkrplot Newbie

Hello, I am trying to write a tcltk based program that plots/manipulates xts/xoo time series objects. I have the code I used from ## http://bioinf.wehi.edu.au/~wettenhall/RTclTkExamples/tkrplot.html : ## require(quantmod) require(tcltk) library(tkrplot) Sys.setenv(TZ=GMT) getSymbols(^GSPC,

Re: [R] tkrplot Newbie

the error message? On Fri, Jun 3, 2011 at 11:42 AM, Costas Vorlow costas.vor...@gmail.com wrote: Hello, I am trying to write a tcltk based program that plots/manipulates xts/xoo time series objects. I have the code I used from ## http://bioinf.wehi.edu.au/~wettenhall/RTclTkExamples

[R] Fwd: open.exe Virus W32.ATRAPS

Hello, I am not sure if this is the correct mailing list to send this email... I was trying to install on windows XP latest R-2.12.2 and my unvirus program (Immunet 3.0) reports a virus at open.exe while this is unpacked: W32.ATRAPS Has anyone come across the same problem? Best, Costas