[R] Grabbing Specific Words from Content (basic text mining)

[arun]

HI,

YOu could do either:
Lines<-readLines(textConnection("Name: John Smith Age: 35 Address: 32, street, sub, something
Name Adam Grey Age: 25 Address: 26, street, sub, something"))   
 Lines[-grep("Name\\:",Lines)]<-gsub("Name","Name:",Lines[-grep("Name\\:",Lines)])
 Name<-gsub("Name\\: (.*) Age\\: (.*) Address\\: (.*)","\\1",Lines)
 age<-gsub("Name\\: (.*) Age\\: (.*) Address\\: (.*)","\\2",Lines)
 Address<-gsub("Name\\: (.*) Age\\: (.*) Address\\: (.*)","\\3",Lines)
 dat1<-data.frame(Name,age,Address,stringsAsFactors=FALSE)
 dat1
dat1
 #       Name age                    Address
#1 John Smith  35 32, street, sub, something
#2  Adam Grey  25 26, street, sub, something


#or
 Lines[-grep("Name\\:",Lines)]<-gsub("Name","Name:",Lines[-grep("Name\\:",Lines)])
res<-read.table(text=gsub("Name|Age|Address","",Lines),sep=":",stringsAsFactors=F)[-1]
res[sapply(res,is.character)]<-do.call(cbind,lapply(res[sapply(res,is.character)],function(x) sub("^[[:space:]]*(.*?)[[:space:]]*$","\\1",x)))
 str(res)
#'data.frame':    2 obs. of  3 variables:
# $ V2: chr  "John Smith" "Adam Grey"
# $ V3: num  35 25
# $ V4: chr  "32, street, sub, something" "26, street, sub, something"
A.K.




----- Original Message -----
From: Sachinthaka Abeywardana <sachin.abeywardana at gmail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Monday, January 14, 2013 4:30 AM
Subject: [R] Grabbing Specific Words from Content (basic text mining)

Hi all,

Suppose I have a data frame with mixed content (name age and address).

a<-"Name: John Smith Age: 35 Address: 32, street, sub, something"
b<-data.frame(a)

1. The question is I want to extract the name age and
address separately from this data frame (containing potentially more
people).

2. Also just incase I have to deal with it how would the syntax change if I
had "Name" as opposed to "Name:" (without the colon).

Any thoughts are much appreciated.

Thanks,
Sachin

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