Re: [R] how do I read certain files from a directory based on number of columns?

[iembry]

Hi Arun, thank you. I will look through that later on today when I get a
chance. I have to complete another part of this project now.

Irucka


<-----Original Message-----> 
>From: arun kirshna [via R] [ml-node+s789695n4661145...@n4.nabble.com]
>Sent: 3/12/2013 10:35:39 PM
>To: iruc...@mail2world.com
>Subject: Re: how do I read certain files from a directory based on
number of
>columns?
>
>Hi, 
>Suppose, I have three files "File1.txt", "File2.txt", "File3.txt" in a
folder. 
>list.files() 
>#[1] "File1.txt" "File2.txt" "File3.txt" 
>read.table("File2.txt",header=TRUE,stringsAsFactors=FALSE) 
># dload_40000 dload_20000 d1 
>#1 1 4 3 
>#2 4 9 9 
>#3 3 8 3 
>
>lapply(list.files(),function(x)
{x1<-x[any(scan(file=x,what="",nlines=1)%in%
>"dload_60000")]; if(length(x1)!=0)
>read.table(x1,header=TRUE,stringsAsFactors=FALSE) else NULL}) 
>#Read 3 items 
>#Read 3 items 
>#Read 1 item 
>#[[1]] 
> # dload_40000 dload_60000 d1 
>#1 1 5 3 
>#2 4 6 9 
>#3 3 4 3 
>
>#[[2]] 
>#NULL 
>
>#[[3]] 
> # dload_60000 
>#1 11 
>#2 44 
>#3 33 
>
>May be this helps you in getting started. 
>A.K. 
>
>
>
>
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>NAML 


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