[R] Deleting rows dataframe in R conditional to “if any of (a specific variable) is equal to”

[Carl Witthoft]

Not too difficult.

Rgames> bar<-c(3,5,7)

Rgames> foo<-c(1,3,5,6,8,9,7)
Rgames> match(bar,foo)
[1] 2 3 7  # these are the matching positions
Rgames> foo[-(match(bar,foo))]
[1] 1 6 8 9



<quote>
  Dear list,

I have been struggling for some time now with this code... I have this 
vector of unique ID "EID" of length 821 extracted from one of my 
dataframe (skate). It looks like this:

 > head(skate$EID)

[1] "896-19" "895-8" "899-1" "899-5" "899-8" "895-7" I would like to 
remove the complete rows in another dataframe (t5) if any of the t5$EID 
is equal (a duplicate) of skate$EID.

I was able to get my 'duplicated' dataframe in t5 of all my matching EID 
as follow:

 > xx<-skate$EID
 > t5[match(xx,t5[,26]), ]#gives me a dataframe of all matching EID in 
skate$EID
        record.t trip set month stratum NAFO unit.area time dur.set distance
8948          5  896  19    11     221   2J       N12  908      15        8
8849          5  895   8    10     766   3O       R36 1650      16        8
9289          5  899   1    12     743   3L       V26 2052      15        8
9299          5  899   5    12     746   3L       W27 1129      14        7
Where t5[,26] correspond to t5$EID column. I'm sure it's simple, but I'm 
not sure how to remove all of these now from my t5 dataframe! Tips would 
be very much appreciated!
Thank you!

Aurelie Cosandey-Godin
Ph.D. student, Department of Biology
Industrial Graduate Fellow, WWF-Canada
Dalhousie University | Email: godina_at_dal.ca
-- 

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