Re: [R] read.frame

From: Alec Stephenson <astephen_at_efs.mq.edu.au>
Date: Thu 08 Jul 2004 - 13:24:20 EST


The help file on the intersect function says

     Performs set union, intersection, (asymmetric!) difference,
     equality and membership on two vectors.

and so intersect(s[,1],c[,1]) is probably what you want.

Alec

Alec Stephenson Department of Statistics
Macquarie University
NSW 2109, Australia

>>> S Peri <biocperi@yahoo.com> 07/08/04 12:56pm >>> Hello group,
  I am learning R and I am new to many concepts.I face the following errors when I am trying to execute the following. I have 4 text files with protein accession numbers. I wanted to represent them in a venn diagram and for that I using intersect and setdiff functions.

My data looks like this:

file1.txt (c):

NP_000005
NP_000020
NP_000030
NP_000053

file2.txt(e):

NP_000005
NP_000020
NP_000030
NP_000031
NP_000053
NP_000055
NP_000087

file3.txt(h):

NP_000005
NP_000020
NP_000030
NP_000053
NP_000055
NP_000057
NP_000087

file4.txt (s):

NP_000005
NP_000020
NP_000030
NP_000033
NP_000053
NP_000055
NP_000087
NP_000168


Now I did the following FIRST time:

c=read.table("file1.txt")
e=read.table("file2.txt")
s=read.table("file4.txt")
h=read.table("file3.txt")

> class(c)

[1] "data.frame"
> class(s)

[1] "data.frame"
> CiS=intersect(c,s)
> CiS
NULL data frame with 0 rows
##### Why am I getting NULL data error. I know there are common elements between c and S. ##########

> CiS<-intersect(read.matrix(c,s))
Error in unique(y[match(x, y, 0)]) : Argument "y" is missing, with no default
> CiS<-intersect(read.frame(c,s))
Error in unique(y[match(x, y, 0)]) : Argument "y" is missing, with no default

##### Why am I getting this error.

Second thing I did:

I loaded the data as data.frame instead read.table(). Again I never get intersection of C,E and S,H.

Can any one please help me.
thank you

SP



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R-help@stat.math.ethz.ch mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 08 13:26:08 2004

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