# [R] logical operations with lists

Zoppoli, Gabriele (NIH/NCI) [G] zoppolig at mail.nih.gov
Fri Feb 12 23:57:47 CET 2010

```I'm sorry but here's what I get:

> A[1:10,]
[1] UQCRC1 IDH3B  PDHA1  SUCLA2 COX5B  SDHB   SDHA   MDH2   DLD    COQ7

> dim(A)
[1] 1013    1

> B[1:10,]
[1] 3.8-1.2 3.8-1.3 3.8-1.4 3.8-1.5 5-HT3c2 A1BG    A1CF    A2BP1   A2LD1   A2M

> dim(B)
[1] 55546     1

> C<-rbind(A,B)
> dim(C)
[1] 56559     1

> D <- C[which(C %in% A ==FALSE)]
> dim(D)
[1] 56559     0

and so with any other proposed method.

I imported the list A and B this way:

and then removed the redundant rows with:

> A<-unique(A)

Guess I'm doing something really wrong here... Sorry for the inexperience, I'm trying to improve...

Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
Guest Researcher, LMP, NCI, NIH, Bethesda MD

Work: 301-451-8575
Mobile: 301-204-5642
Email: zoppolig at mail.nih.gov
________________________________________
From: jbreichel at gmail.com [jbreichel at gmail.com] On Behalf Of Jonathan [jonsleepy at gmail.com]
Sent: Friday, February 12, 2010 5:21 PM
To: Zoppoli, Gabriele (NIH/NCI) [G]
Cc: r-help at r-project.org
Subject: Re: [R] logical operations with lists

This is probably not the best way, but (assuming you had vectors and
not lists, since I'm not sure what your list looks like):

C <- B[which(B %in% A ==FALSE)]

Regards,
Jonathan

On Fri, Feb 12, 2010 at 5:06 PM, Zoppoli, Gabriele (NIH/NCI) [G]
<zoppolig at mail.nih.gov> wrote:
> Sorry, maybe it's easy but I haven't found anything useful:
>
> how can I obtain a list C that contains all the members in the list B that are not in list A? This are lists of nanes, not numbers!
>
> Thank you
>
>
> Gabriele Zoppoli, MD
> Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
> Guest Researcher, LMP, NCI, NIH, Bethesda MD
>
> Work: 301-451-8575
> Mobile: 301-204-5642
> Email: zoppolig at mail.nih.gov
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