R help - Apr 2013 - grup function

Hello,

How can i mattch blanks within words, when i have more phrases?

c("Shangh i", "Hello here i am","h llo")

> gsub(" ","a",c("Shangh i", "Hello here i
am","h llo"))
[1] "Shanghai"        "Helloahereaiaam" "hallo"


I would like to have [1] "Shanghai"  "Hello here i am"
"hallo"

I hope someone can help me.


Thanks,

	[[alternative HTML version deleted]]

Below.

On Wed, Apr 10, 2013 at 3:58 AM, Dominic Roye <dominic.roye at gmail.com>
wrote:
> Hello,
>
> How can i mattch blanks within words, when i have more phrases?
>
> c("Shangh i", "Hello here i am","h llo")
>
>
>> gsub(" ","a",c("Shangh i", "Hello
here i am","h llo"))
> [1] "Shanghai"        "Helloahereaiaam"
"hallo"
>
>
> I would like to have [1] "Shanghai"  "Hello here i am"
"hallo"
>
> I hope someone can help me.
Doubt if anyone can.

To a parser, "Shangh i" is just as much two valid "words" as
"I am"  of "am I".

So either you have to give the parser (the regex engine)  more rules
(patterns)  to distinguish "words"  from non-words or have a
dictionary handy.
>From your example, saying that a blank following or preceding a word
consisting of a single letter should be replaced might not produce too
high a false positive rate, but it will obviously miss on I and a. But
maybe your real situation doesn't conform to this.

(I would be fascinated to be shown how I am wrong about this if I am!)

-- Bert


>
>
> Thanks,
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm

Hi,
The pattern is not clear.? 
In this particular case,
library(stringr)
word1<-c("Shangh i", "Hello here i am","h llo")
?word1[str_count(word1," ")==1]<-gsub("
","a",word1[str_count(word1," ")==1])
?word1
#[1] "Shanghai"??????? "Hello here i am" "hallo" 


But, this will? not work here:
word2<-c("Shangh i", "B lanced food","h llo")



A.K.



----- Original Message -----
From: Dominic Roye <dominic.roye at gmail.com>
To: R help <r-help at r-project.org>
Cc: 
Sent: Wednesday, April 10, 2013 6:58 AM
Subject: [R] grup function

Hello,

How can i mattch blanks within words, when i have more phrases?

c("Shangh i", "Hello here i am","h llo")

> gsub(" ","a",c("Shangh i", "Hello here i
am","h llo"))
[1] "Shanghai"? ? ? ? "Helloahereaiaam" "hallo"


I would like to have [1] "Shanghai"? "Hello here i am"
"hallo"

I hope someone can help me.


Thanks,

??? [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.