[R] Problem with comparing multiple data sets

John Kane jrkrideau at inbox.com
Sat May 23 15:23:59 CEST 2015

Hi Mohammad 

Welcome to the R-help list.

There probably is a fairly easy way to what you want but I think we probably need a bit more background information on what you are trying to achieve.  I know I'm not exactly clear on your decision rule(s). 

It would also be very useful to see some actual sample data in useable R format.Have a look at these links http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example and http://adv-r.had.co.nz/Reproducibility.html for some hints on what you might want to include in your question.

In particular, read up about dput()  in those links and/or see ?dput.  This is the generally preferred way to supply sample or illustrative data to the R-help list.  It basically creates a perfect copy of the data as it exists on 'your' machine so that R-help readers see exactly what you do.  

John Kane
Kingston ON Canada

> -----Original Message-----
> From: mxalimohamma at ualr.edu
> Sent: Fri, 22 May 2015 12:37:50 -0500
> To: r-help at r-project.org
> Subject: [R] Problem with comparing multiple data sets
> Hi everyone,
> I am very new to R and I have a task to do. I appreciate any help. I have
> 3
> data sets. Each data set has 4 columns. For example:
> Class  Comment   Term   Text
> 0           com1        aac    text1
> 2           com2        aax    text2
> 1           com3        vvx    text3
> Now I need t compare the class section between 3 data sets and assign the
> most available class to that text. For example if text1 is assigned to
> class 0 in data set 1&2 but assigned as 2 in data set 3 then it should be
> assigned to class 0. If they are all the same so the class will be the
> same. The ideal thing would be to keep the same format and just update
> the
> class. Is there any easy way to do this?
> Thanks a lot.
> 	[[alternative HTML version deleted]]
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