Hello David, You may be interested also by the regul() function and similar fro the pastecs package: it is designed to solve the kind of problems you talk about. You should read the manual, which is included. However, this manual is in French. Best,
Philippe ..............................................<°}))><........ ) ) ) ) ) ( ( ( ( ( Prof. Philippe Grosjean ) ) ) ) ) ( ( ( ( ( Numerical Ecology of Aquatic Systems ) ) ) ) ) Mons-Hainaut University, Pentagone (3D08) ( ( ( ( ( Academie Universitaire Wallonie-Bruxelles ) ) ) ) ) 8, av du Champ de Mars, 7000 Mons, Belgium ( ( ( ( ( ) ) ) ) ) phone: + 32.65.37.34.97, fax: + 32.65.37.30.54 ( ( ( ( ( email: [EMAIL PROTECTED] ) ) ) ) ) ( ( ( ( ( web: http://www.umh.ac.be/~econum ) ) ) ) ) http://www.sciviews.org ( ( ( ( ( .............................................................. David James wrote: > Hello, > > I'm working with irregular time series data. What do you all think > about the strengths and weaknesses of the "zoo" and "its" packages? > > I've installed and skimmed the documentation on both packages. I was > hoping to get a little guidance from the user community before > proceeding further. > > In case anyone is interested in my particular problem: I'm looking > at some (surface) temperature data from NOAA: http:// > cdo.ncdc.noaa.gov/ulcd/ULCD > It is (irregular) time series format. The NOAA data reports year, > month, date, hour, and minute. I want to group the data into hourly > chunks. However, sometimes there are multiple observation per hour > -- i.e an observation at 3:45 and 3:56. Also, sometimes a particular > hour may be missing altogether. I need to clean up the data so that > each hour has one and only one data point. > > I'm relatively new to R, but I think I'm getting a hold on it pretty > well so far. I used to do a lot with MATLAB, and there seem to be > many parallels between it and R. I have background in public policy > and econometrics. > > Thanks, > David > > On Aug 25, 2005, at 12:29 PM, Mathieu Drapeau wrote: > > >>Hi, >>I just installed ROracle and RDBI. The connection to the database >>seems >>to work also. My problem is when I am selection rows that really exist >>in the database, it is returning nothing. Where should I look to see >>what could be my problem? >> >>Thank you very much, >>Mathieu >> >> >> >>>drv <- dbDriver("Oracle") >>>summary(drv, verbose=TRUE) >>> >> >><OraDriver:(6721)> >> Driver name: Oracle (ProC/C++) >> Max connections: 10 >> Conn. processed: 8 >> Default records per fetch: 500 >> Oracle R/S client version: 0.5-4 >> RS-DBI version: 0.1-9 >> Open connections: 2 >> 1 <OraConnection:(6721,0)> >> 2 <OraConnection:(6721,7)> >> >>>conn <- dbConnect(drv, "mathieu/[EMAIL PROTECTED]") >>>summary(conn, verbose=TRUE) <OraConnection:(6721,7)> >>> >> User: mathieu >> Dbname: MYDB >> Oracle Server version: >> >> >>>rs <- dbSendQuery(conn, statement = paste("select * from cat")) >>>summary(rs, verbose=TRUE) >>> >> >><OraResult:(6721,7,2)> >> Statement: select * from cat >> Has completed? no >> Affected rows: 0 >> Rows fetched: -1 >> Fields: >> name Sclass type len precision scale isVarLength nullOK >>1 TABLE_NAME character VARCHAR2 30 0 0 TRUE FALSE >>2 TABLE_TYPE character VARCHAR2 11 0 0 TRUE TRUE >> >> >>>myContent <- fetch(rs, n = -1) >>>myContent >>> >> >>[1] TABLE_NAME TABLE_TYPE >><0 rows> (or 0-length row.names) >> >> >>>summary(myContent, verbose=TRUE) >>> >> >> TABLE_NAME TABLE_TYPE >> Length:0 Length:0 >> Class :character Class :character >> Mode :character Mode :character >> >> >>>summary(rs, verbose=TRUE) >>> >> >><OraResult:(6721,7,2)> >> Statement: select * from cat >> Has completed? yes >> Affected rows: 0 >> Rows fetched: -1 >> Fields: >> name Sclass type len precision scale isVarLength nullOK >>1 TABLE_NAME character VARCHAR2 30 0 0 TRUE FALSE >>2 TABLE_TYPE character VARCHAR2 11 0 0 TRUE TRUE >> >>______________________________________________ >>[email protected] mailing list >>https://stat.ethz.ch/mailman/listinfo/r-help >>PLEASE do read the posting guide! http://www.R-project.org/posting- >>guide.html >> > > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
