Re: [R] write.csv +RMySQL request

From: Tristan Casey <nub_vulcanis_at_hotmail.com>
Date: Fri, 29 Feb 2008 18:38:30 +1000

Thanks again for your help.

I am wanting my variable to store a character string exactly as the write.csv function would store as a csv text file;

IE: My goal is to store a data frame of this construction;

x1 x2
1 2
3 4

as "X1","X2",1,2,3,4 (the same format as CSV).

I am aware of the file argument, however that is the problem, storing to a physical text file and then importing into the SQL database is a very inefficient way of doing things, especially when I can use RMySQL to send commands directly to the database.

Kind Regards,

Tristan Casey BPsySci (UQ)
+ 4 Festa Court, Capalaba, QLD 4157
H 8/33 Lilly St, Greenslopes, QLD 4120
0450 033 948

> Date: Fri, 29 Feb 2008 05:12:04 +0000
> From: ripley_at_stats.ox.ac.uk
> To: jholtman_at_gmail.com
> CC: nub_vulcanis_at_hotmail.com; r-help_at_r-project.org
> Subject: Re: [R] write.csv +RMySQL request
>
> On Thu, 28 Feb 2008, jim holtman wrote:
>
> > ?capture.output
> >
> > myoutput <- capture.output(write.csv(...))
>
> It would be better to write directly to a text connection: see the 'file'
> argument to write.csv.
>
> > On Thu, Feb 28, 2008 at 7:34 PM, Tristan Casey <nub_vulcanis_at_hotmail.com> wrote:
> >> Hello,
> >>
> >> I am relatively new to R and learning its ins and outs. As part of a website I am building, I need to read and write csv files directly from an SQL database. Basically I want to convert R variables (dataframes) into CSV format, store them as another R variable (as a properly formatted text string suitable for csv reading) and then send this to one row in a database.
> >>
> >> The SQL part is fine, the problem arises because I cannot capture the output of write.csv! It posts to the terminal when file="" is used, however I also want to store it. Does anyone have any ideas?
> >>
> >> Thanks in advance!
>
> --
> Brian D. Ripley, ripley_at_stats.ox.ac.uk
> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
> University of Oxford, Tel: +44 1865 272861 (self)
> 1 South Parks Road, +44 1865 272866 (PA)
> Oxford OX1 3TG, UK Fax: +44 1865 272595



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