Hi,
So the file you want to read is on the client machine, and you want to
transfer it to the server and read it into R ?
What I guess you need is :
- open a FileInputStream, many many tutorials on the web will tell you
how this works.
- open a RFileOutputStream
- call the read(byte[] b) method of the FileInputStream as many times as
necessary to get a byte[] each time
- send each of these byte[] to the RFileOutputStream
- close the RFileOutputStream when there is nothing more to send
- then your file is in the server side now, you can read it into R using
whatever suitable R command read.csv, read.delim, ...
Does that help ?
Romain
On 08/04/2009 04:01 PM, joaodaniel wrote:
Hello,
Actually you are right. I was looking on the wrong direction. But I still
got some doubts about how to use those methods.
I want to open a file on the client machine, for example a txt
tab-delimited, and create a dataframe with its information on R.
I got to create a RFileInputStream object, using the openFile method, so it
store the file information. Then I must use the read() method from the
RFileInputStream to get file information. And finally, I should use the
assing() method to relate the data with an R object. Is that right?
Romain Francois-2 wrote:
Hi,
The Rserve implementation of REngine does not support references (yet?).
Anyway, I don't think references are what you need here.
You probably want the methods createFile and openFile that create
RFileInputStream and RFileOutputStream which you can use to transfer
files through the R server wire.
http://www.rforge.net/org/docs/org/rosuda/REngine/Rserve/RConnection.html
Romain
On 08/03/2009 04:57 PM, joaodaniel wrote:
I need to input a txt, or xls, file from a client to R, using RServe.
From what I've been reading, the best way to do this, is using the
'createReference' method, from REngine package.
But I couldn't find any documents exemplifying it's use. I got to upload
a
file from java? And then? How do i refeer the file to this method?
Best Regards,
J. Daniel
--
Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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