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 <[email protected]>
To: R help <[email protected]>
Cc: "[email protected]"
<[email protected]>
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, "[email protected]"
<[email protected]> 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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