R help - Sep 2010 - size limit of string/parse a string and convert to vector

Hi,
I have a loop as follows,

dataStr <- character(0)
 repeat{
  fstr<-read.socket(sockfd)
  if(fstr=="")
  break
  dataStr<-paste(dataStr,fstr)
 }

at what point does dataStr stop accepting(gets full)? I'm sending millions
of records over the socket and need to know if all of it can go into dataStr.

Also, Incase all of it cannot go into dataStr, I need to parse each read.socket.
In such a case,
I have a string as follows,
"|1,ab,2.34|2,cd,3.44|" how can I parse this to become a list of 2
string vectors, namely,
list(c("1","ab","2.34"),c("2","cd","3.44"))

Any help is appreciated
	[[alternative HTML version deleted]]

try this:
> x <- "|1,ab,2.34|2,cd,3.44|"
> # split by the "|" and remove vectors of zero characters
> x.sp <- strsplit(x, '|', fixed = TRUE)[[1]]
> x.sp <- x.sp[nchar(x.sp) > 0]
> # now split by comma
> x.comma <- strsplit(x.sp, ',')
> # you can now access you data
> x.comma
[[1]]
[1] "1"    "ab"   "2.34"

[[2]]
[1] "2"    "cd"   "3.44"



On Mon, Sep 6, 2010 at 6:06 AM, rajeshj at cse.iitm.ac.in
<rajeshj at cse.iitm.ac.in> wrote:
>
> Hi,
> I have a loop as follows,
>
> dataStr <- character(0)
> ?repeat{
> ?fstr<-read.socket(sockfd)
> ?if(fstr=="")
> ?break
> ?dataStr<-paste(dataStr,fstr)
> ?}
>
> at what point does dataStr stop accepting(gets full)? I'm sending
millions of records over the socket and need to know if all of it can go into
dataStr.
>
> Also, Incase all of it cannot go into dataStr, I need to parse each
read.socket. In such a case,
> I have a string as follows,
> "|1,ab,2.34|2,cd,3.44|" how can I parse this to become a list of
2 string vectors, namely,
>
list(c("1","ab","2.34"),c("2","cd","3.44"))
>
> Any help is appreciated
> ? ? ? ?[[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.
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

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