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...for her dissertation. Similarly, while working on a competitive analysis, it would be nice to be able to replace the names of the competitors with their brand logos. My searches so far led to inconclusive results and, therefore, any suggestions are welcome. Thank you so much. Tudor -- Tudor Dan Bodea Georgia Institute of Technology School of Civil and Environmental Engineering Web: http://www.prism.gatech.edu/~gtg757i

Tudor Bodea asked: >In this context, I try to get all the records for which market is atl-bos, >competitor is delta and dd is 2007-11-20 (first record above). To do this I used >># channel <- odbcConnectAccess("test.mdb") >>res <- sqlQuery(channel, "select * from test_t...

...market = 'atl-bos' and competitor = 'delta' and dd = #2007-11-20#") Hope this helps, Stefano -----Messaggio originale----- Da: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]Per conto di Mark Wardle Inviato: marted? 13 novembre 2007 11.59 A: Tudor Bodea Cc: r-help at stat.math.ethz.ch Oggetto: Re: [R] Query an Access database based on a date attribute On 12/11/2007, Tudor Bodea <gtg757i at mail.gatech.edu> wrote: > Dear useRs, > > I would like to query an Access database through R based on a date attribute > but, unfortunately,...

...rporate this information into the package building process. If you already experienced this issue and have some useful suggestions, I would really appreciate your taking the time to share them with me. For this project, I am using R2.7.1 on a Windows XP machine. Thank you. Tudor -- Tudor Dan Bodea Georgia Institute of Technology School of Civil and Environmental Engineering Web: http://www.prism.gatech.edu/~gtg757i

...possible to write a string in the header/footer of a pdf file created during a plot session? To make sure that I know what R script generated a certain chart, I would like to add the path to the working directory into the header/footer of the corresponding pdf file. Thank you. Tudor -- Tudor Dan Bodea Georgia Institute of Technology School of Civil and Environmental Engineering Web: http://www.prism.gatech.edu/~gtg757i

...petitor dd price <0 rows> (or 0-length row.names) Does any of you know what it is going on? I suspect that the last expression in the select statement is not executed/interpreted correctly and, as a consequence, the query leads to the above empty set. Thank you. Tudor -- Tudor Dan Bodea Georgia Institute of Technology School of Civil and Environmental Engineering Web: http://www.prism.gatech.edu/~gtg757i

...e with me what you think constitutes the best practices and/or (2) point out to me any online material relevant to the topic. I run various versions of R on Windows and multiple UNIX platforms. The list of items is read from a .csv file and stored in a dataframe. Thank you. Tudor -- Tudor Dan Bodea Georgia Institute of Technology School of Civil and Environmental Engineering Web: http://www.prism.gatech.edu/~gtg757i

Dear R users: Is there a way to append selectively to components of a list (if possible, loops are to be avoided)? To illustrate the point, in the example below, I would like to append 99 to vector b of the list l. > l <- list(a=c(1), b=c(2,3), c=c(4,5,6)) > l $a [1] 1 $b [1] 2 3 $c [1] 4 5 6 As you may expect, the result should look like: > l $a [1] 1 $b [1] 2 3 99 $c [1] 4 5