R help - Aug 2017 - help with read.csv() for files with different number of columns

Dear R community,
I have a text file (test.txt) with different number of columns:
0610007P14Rik%%% Tcf19 Gtf2i 0610010O12Rik%%% Ivns1abp Etv6 1100001G20Rik%%% Nmi
1500015O10Rik%%% Foxi1 Ascl3 Sirt3 1700003E16Rik%%% Ascl2 Ifnar2
1700028J19Rik%%% Musk Nfe2l3 1810011O10Rik%%% Ppp1r13b Bpnt1 Cdkn2c Foxc1 Sox10
Smarca2 1810019D21Rik%%% Asb8 1810037I17Rik%%% Zfp612 1810055G02Rik%%% Nkx2-3
Maged1 Runx1 Ugp2 Elk4 Spdef Tcf19 Isl2 Gtf2i Ctnnbl1 Tcea3 Ank2 Zfp612 Creb3l1
Nupr1 3632451O06Rik Creb3l4 Lass6
I wold like to read it into R using
 > test=read.csv("test.txt",sep="\t",header=FALSE)
However, when I check the r object "test", I found that all the rows
have 5 columns:
> test?? ? ? ? ? ? ? ? V1? ? ? ? ? ? V2? ? ? V3 ? ? V4? ? ? V51?
0610007P14Rik%%% ? ? ? ? Tcf19 ? Gtf2i? ? ? ? ? ? ? ?2? 0610010O12Rik%%%? ? ?
Ivns1abp? ? Etv6? ? ? ? ? ? ? ?3? 1100001G20Rik%%% ? ? ? ? ? Nmi? ? ? ? ? ? ? ?
? ? ? ?4? 1500015O10Rik%%% ? ? ? ? Foxi1 ? Ascl3? Sirt3 ? ? ? ?5?
1700003E16Rik%%% ? ? ? ? Ascl2? Ifnar2? ? ? ? ? ? ? ?6? 1700028J19Rik%%%? ? ? ?
? Musk? Nfe2l3? ? ? ? ? ? ? ?7? 1810011O10Rik%%%? ? ? Ppp1r13b ? Bpnt1 Cdkn2c ?
Foxc18 ? ? ? ? ? ? Sox10 ? ? ? Smarca2? ? ? ? ? ? ? ? ? ? ? ?9?
1810019D21Rik%%%? ? ? ? ? Asb8? ? ? ? ? ? ? ? ? ? ? ?10 1810037I17Rik%%%? ? ? ?
Zfp612? ? ? ? ? ? ? ? ? ? ? ?11 1810055G02Rik%%%? ? ? ? Nkx2-3? Maged1? Runx1? ?
Ugp212 ? ? ? ? ? ? Elk4 ? ? ? ? Spdef ? Tcf19 ? Isl2 ? Gtf2i13? ? ? ? ? Ctnnbl1
? ? ? ? Tcea3? ? Ank2 Zfp612 Creb3l114? ? ? ? ? ? Nupr1 3632451O06Rik Creb3l4?
Lass6?
Basically it breaks some rows into more than one rows. For example, row 7 in the
original record becomes two rows. Looks like the "test" always has 5
columns.?
How does this happen? How should I fix it to make one record into one two in R
object?
Thank you very much!
Ace




 


   
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Hi, Jim,
Thank you very much for pointing out the format issue. Here is the original
text:
===I have a text file (test.txt) with different number of columns:

0610007P14Rik%%% Tcf19 Gtf2i 0610010O12Rik%%% Ivns1abp Etv6 1100001G20Rik%%% Nmi
1500015O10Rik%%% Foxi1 Ascl3 Sirt3 1700003E16Rik%%% Ascl2 Ifnar2
1700028J19Rik%%% Musk Nfe2l3 1810011O10Rik%%% Ppp1r13b Bpnt1 Cdkn2c Foxc1 Sox10
Smarca2 1810019D21Rik%%% Asb8 1810037I17Rik%%% Zfp612 1810055G02Rik%%% Nkx2-3
Maged1 Runx1 Ugp2 Elk4 Spdef Tcf19 Isl2 Gtf2i Ctnnbl1 Tcea3 Ank2 Zfp612 Creb3l1
Nupr1 3632451O06Rik Creb3l4 Lass6
I wold like to read it into R using
 > test=read.csv("test.txt",sep="\t",header=FALSE)
However, when I check the r object "test", I found that all the rows
have 5 columns:
> test?? ? ? ? ? ? ? ? V1? ? ? ? ? ? V2? ? ? V3 ? ? V4? ? ? V51?
0610007P14Rik%%% ? ? ? ? Tcf19 ? Gtf2i? ? ? ? ? ? ? ?2? 0610010O12Rik%%%? ? ?
Ivns1abp? ? Etv6? ? ? ? ? ? ? ?3? 1100001G20Rik%%% ? ? ? ? ? Nmi? ? ? ? ? ? ? ?
? ? ? ?4? 1500015O10Rik%%% ? ? ? ? Foxi1 ? Ascl3? Sirt3 ? ? ? ?5?
1700003E16Rik%%% ? ? ? ? Ascl2? Ifnar2? ? ? ? ? ? ? ?6? 1700028J19Rik%%%? ? ? ?
? Musk? Nfe2l3? ? ? ? ? ? ? ?7? 1810011O10Rik%%%? ? ? Ppp1r13b ? Bpnt1 Cdkn2c ?
Foxc18 ? ? ? ? ? ? Sox10 ? ? ? Smarca2? ? ? ? ? ? ? ? ? ? ? ?9?
1810019D21Rik%%%? ? ? ? ? Asb8? ? ? ? ? ? ? ? ? ? ? ?10 1810037I17Rik%%%? ? ? ?
Zfp612? ? ? ? ? ? ? ? ? ? ? ?11 1810055G02Rik%%%? ? ? ? Nkx2-3? Maged1? Runx1? ?
Ugp212 ? ? ? ? ? ? Elk4 ? ? ? ? Spdef ? Tcf19 ? Isl2 ? Gtf2i13? ? ? ? ? Ctnnbl1
? ? ? ? Tcea3? ? Ank2 Zfp612 Creb3l114? ? ? ? ? ? Nupr1 3632451O06Rik Creb3l4?
Lass6?
Basically it breaks some rows into more than one rows. For example, row 7 in the
original record becomes two rows. Looks like the "test" always has 5
columns.?
How does this happen? How should I fix it to make one record into one two in R
object?
=Please let?me know if it is readable now. Thank you very much for your time!
Kind regards,
Ace 

    On Sunday, August 27, 2017 7:25 PM, Jim Lemon <drjimlemon at
gmail.com> wrote:
 

 Hi Ace,
As your example seems to have spaces as separators,

testdf<-read.table("test.txt",header=FALSE,fill=TRUE,
col.names=paste("V",1:14,sep=""),stringsAsFactors=FALSE)

By specifying the number of columns with "col.names" and using
"fill=TRUE" you can get a data frame with zero length strings where
values are missing in the input file.

Jim

On Mon, Aug 28, 2017 at 6:25 AM, Fix Ace via R-help
<r-help at r-project.org> wrote:
> Dear R community,
> I have a text file (test.txt) with different number of columns:
> 0610007P14Rik%%% Tcf19 Gtf2i 0610010O12Rik%%% Ivns1abp Etv6
1100001G20Rik%%% Nmi 1500015O10Rik%%% Foxi1 Ascl3 Sirt3 1700003E16Rik%%% Ascl2
Ifnar2 1700028J19Rik%%% Musk Nfe2l3 1810011O10Rik%%% Ppp1r13b Bpnt1 Cdkn2c Foxc1
Sox10 Smarca2 1810019D21Rik%%% Asb8 1810037I17Rik%%% Zfp612 1810055G02Rik%%%
Nkx2-3 Maged1 Runx1 Ugp2 Elk4 Spdef Tcf19 Isl2 Gtf2i Ctnnbl1 Tcea3 Ank2 Zfp612
Creb3l1 Nupr1 3632451O06Rik Creb3l4 Lass6
> I wold like to read it into R using
>? > test=read.csv("test.txt",sep="\t",header=FALSE)
> However, when I check the r object "test", I found that all the
rows have 5 columns:
>> test? ? ? ? ? ? ? ? V1? ? ? ? ? ? V2? ? ? V3? ? V4? ? ? V51?
0610007P14Rik%%%? ? ? ? Tcf19? Gtf2i? ? ? ? ? ? ? 2? 0610010O12Rik%%%? ? ?
Ivns1abp? ? Etv6? ? ? ? ? ? ? 3? 1100001G20Rik%%%? ? ? ? ? Nmi? ? ? ? ? ? ? ? ?
? ? 4? 1500015O10Rik%%%? ? ? ? Foxi1? Ascl3? Sirt3? ? ? ? 5? 1700003E16Rik%%%? ?
? ? Ascl2? Ifnar2? ? ? ? ? ? ? 6? 1700028J19Rik%%%? ? ? ? ? Musk? Nfe2l3? ? ? ?
? ? ? 7? 1810011O10Rik%%%? ? ? Ppp1r13b? Bpnt1 Cdkn2c? Foxc18? ? ? ? ? ? Sox10?
? ? Smarca2? ? ? ? ? ? ? ? ? ? ? 9? 1810019D21Rik%%%? ? ? ? ? Asb8? ? ? ? ? ? ?
? ? ? ? 10 1810037I17Rik%%%? ? ? ? Zfp612? ? ? ? ? ? ? ? ? ? ? 11
1810055G02Rik%%%? ? ? ? Nkx2-3? Maged1? Runx1? ? Ugp212? ? ? ? ? ? Elk4? ? ? ?
Spdef? Tcf19? Isl2? Gtf2i13? ? ? ? ? Ctnnbl1? ? ? ? Tcea3? ? Ank2 Zfp612
Creb3l114? ? ? ? ? ? Nupr1 3632451O06Rik Creb3l4? Lass6
> Basically it breaks some rows into more than one rows. For example, row 7
in the original record becomes two rows. Looks like the "test" always
has 5 columns.
> How does this happen? How should I fix it to make one record into one two
in R object?
> Thank you very much!
> Ace
>
>
>
>
>
>
>
>
>? ? ? ? [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
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