Re: [R] Finding unmatched data between two dataframe using severalfactors

From: Peter Alspach <PAlspach_at_hortresearch.co.nz>
Date: Mon, 12 May 2008 10:50:18 +1200

Andrew

Have you tried:

dat2[!paste(dat2[,1], dat2[,2])%in%paste(dat1[,1], dat1[,2]),] ?

HTH .... Peter Alspach  

> -----Original Message-----
> From: r-help-bounces_at_r-project.org
> [mailto:r-help-bounces_at_r-project.org] On Behalf Of Andrew McFadden
> Sent: Monday, 12 May 2008 9:40 a.m.
> To: r-help_at_r-project.org
> Subject: [R] Finding unmatched data between two dataframe
> using severalfactors
>
> Hi R users
>
> I am trying to find unmatched data from two dataframes. I
> would like to find unmatched data based on several factors.
> For the following data:
>
> dat1 <- data.frame(x = paste("A", 1:6, sep=""),
> y = c("andy","bob","ciaran","dan", "eion",
> "fred"))
> dat1
>
>
> dat2 <- data.frame(x = paste("A", c(1,2,3,5,6), sep=""),
> y = c("andy", "bob", "ciaran",
> "dan", "zane"),z=c(10,20,30,40,50))
>
> dat2
>
>
> I would like to know data that from dat2 that doesn't appear in dat1
> based on both the x and y factors ie (A5, dan, 40) and (A6,zane, 50).
>
> I have tried two approaches but have not been successful
>
> ? nomatch <- subset(dat1, is.element(?) == FALSE)
> ? setdiff(dat1$x,dat2$y)
>
> Any thoughts would be great
>
> Regards
>
> Andy
>
> Andrew McFadden MVS BVSc
> Incursion Investigator
> Investigation & Diagnostic Centres - Wallaceville Biosecurity New
> Zealand Ministry of Agriculture and Forestry
>
> Phone 04 894 5600 Fax 04 894 4973 Mobile 029 894 5611 Postal address:
> Investigation and Diagnostic Centre- Wallaceville Box 40742 Ward St
> Upper Hutt
>
>
> ##############################################################
> ##########
> This email message and any attachment(s) is intended solely for the
> addressee(s) named above. The information it contains is confidential
> and may be legally privileged. Unauthorised use of the
> message, or the
> information it contains, may be unlawful. If you have received this
> message by mistake please call the sender immediately on 64 4 8940100
> or notify us by return email and erase the original message and
> attachments. Thank you.
>
> The Ministry of Agriculture and Forestry accepts no responsibility for
> changes made to this email or to any attachments after
> transmission from
> the office.
> ##############################################################
> ##########
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

The contents of this e-mail are privileged and/or confidential to the named  recipient and are not to be used by any other person and/or organisation.  If you have received this e-mail in error, please notify the sender and delete  all material pertaining to this e-mail.



R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Sun 11 May 2008 - 22:54:20 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sun 11 May 2008 - 23:30:44 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive