Please ignore. This works.

str_extract_all(a$Col1,"[0-9]+(,|/|)")

Mohan



From:   mohan.radhakrishnan@polarisft.com
To:     arun <smartpink111@yahoo.com>
Cc:     R help <r-help@r-project.org>
Date:   11/04/2013 12:22 PM
Subject:        Re: [R] Replace element with pattern
Sent by:        r-help-bounces@r-project.org



Hi,

    How do we extract the numbers into an array or data frame assuming the 

rows of text is in a data frame ?

> head(a)
 Col1
1 Current Usage : init:2359296 
used:15857920,committed:15892480,max:50331648|
2 Current Usage : init:2359296 
used:15857920,committed:15892480,max:50331648|
> 

The working pattern is this [0-9]*(,|\|)

I tried

gsub("[0-9]*(,|/|)","",a$Col1)

> grep("[0-9]*(,|/|)",a$Col1,value=TRUE)
[1] "Current Usage : init:2359296 
used:15857920,committed:15892480,max:50331648|"
[2] "Current Usage : init:2359296 
used:15857920,committed:15892480,max:50331648|"
>

> str_extract(a$Col1,"[0-9]*(,|/|)")
[1] "" ""


Thanks



From:   arun <smartpink111@yahoo.com>
To:     R help <r-help@r-project.org>
Cc:     "mohan.radhakrishnan@polarisft.com" 
<mohan.radhakrishnan@polarisft.com>
Date:   11/01/2013 06:40 PM
Subject:        Re: [R] Replace element with pattern





Hi,

Try this:

Lines1 <- readLines(textConnection("Peak Usage    : init:2359296, 
used:15859328, committed:15892480,max:50331648Current Usage : init:2359296 

used:15857920,committed:15892480,max:50331648|-------------------|
Peak Usage    : init:2359296, used:15859328, 
committed:15892480,max:50331648Current Usage : init:2359296 
used:15857920,committed:15892480,max:50331648|-------------------|"))

data.frame(Col1=as.matrix(gsub("(.*?[/|])","\\1",Lines1))) #Assuming that 
you want to read it from Peak Usage to the first "|":

#If it is from Current Usage to "|"

data.frame(Col1=as.matrix(gsub("^.*(Current.*?[/|]).*","\\1",Lines1)))


A.K.


On Friday, November 1, 2013 4:11 AM, "mohan.radhakrishnan@polarisft.com" 
<mohan.radhakrishnan@polarisft.com> wrote:
Hi,
         I have a data frame with one column and several rows of the form.

"Peak Usage    : init:2359296, used:15859328, committed:15892480, 
max:50331648Current Usage : init:2359296, used:15857920, 
committed:15892480, max:50331648|-------------------|"

I tested the regex 

Current.*?[\|]

in an online tester which greedily matches upto the first 'pipe' character

Current Usage : init:2359296, used:15857920, committed:15892480, 
max:50331648|

This is what I want.

I tried to replace the entire rows using 

apply( y, 1, function(x) gsub(x,"Current.*?[/|]",x)) which didn't work.

How is this done ? I also want to recursively apply some more patterns one 


by one on the rows till I reduce it to exactly what I want. Is there a way 


to do this without loops ?

Thanks,
Mohan


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