R help - Jul 2003 - unz()

I am having problems getting the unz() function to work as a connection to
start reading a file...

z <- unz("c:/temp/stoxx.zip", "close_tmi_components.txt",
"r")
readLines(z,2)

yields the following problems:
> z <- unz("c:/temp/stoxx.zip",
"close_tmi_components.txt", "r")
Error in unz("c:/temp/stoxx.zip",
"close_tmi_components.txt", "r") :
        unable to open connection
In addition: Warning message: 
cannot locate file `close_tmi_components.txt' in zip file
`c:/temp/stoxx.zip' 
> readLines(z,2)
Error in readLines(z, 2) : cannot open the connection
In addition: Warning message: 
cannot locate file `close_tmi_components.txt' in zip file
`c:/temp/stoxx.zip' 

can anybody offer any advice?

Regards,

John Marsland


********************************************************************** 
This is a commercial communication from Commerzbank AG.\ \ T...{{dropped}}

I've solve my own problem! apologies.

For the record:

the "filename" argument should include the full path of the file
within the
directory structure of the zip file.

but there seeks to be an issue with readLines:
> readLines(z,2)
Error in readLines(z, 2) : seek not enabled for this connection

readLines(z) works fine for the whole file, but unfortunately you cannot use
things like read.table etc.

> -----Original Message-----
> From: Marsland, John [mailto:John.Marsland at commerzbankib.com]
> Sent: 11 July 2003 11:44
> To: 
> Subject: [R] unz()
> 
> 
> 
> I am having problems getting the unz() function to work as a 
> connection to
> start reading a file...
> 
> z <- unz("c:/temp/stoxx.zip",
"close_tmi_components.txt", "r")
> readLines(z,2)
> 
> yields the following problems:
> 
> > z <- unz("c:/temp/stoxx.zip",
"close_tmi_components.txt", "r")
> Error in unz("c:/temp/stoxx.zip",
"close_tmi_components.txt", "r") :
>         unable to open connection
> In addition: Warning message: 
> cannot locate file `close_tmi_components.txt' in zip file
> `c:/temp/stoxx.zip' 
> > readLines(z,2)
> Error in readLines(z, 2) : cannot open the connection
> In addition: Warning message: 
> cannot locate file `close_tmi_components.txt' in zip file
> `c:/temp/stoxx.zip' 
> 
> can anybody offer any advice?
> 
> Regards,
> 
> John Marsland
> 
> 
> **************************************************************
> ******** 
> This is a commercial communication from Commerzbank AG.\ \ 
> T...{{dropped}}
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 

********************************************************************** 
This is a commercial communication from Commerzbank AG.\ \ T...{{dropped}}

I am having some problems with unz() under R 1.7.1 using windows NT 4.0

download.file(url="http://www.test.com/test.zip",
destfile="c:/temp/test.zip", mode="wb")
z <- unz("c:/temp/test.zip", "home/test.txt",
open="r")
test <- read.table(z,sep=";",skip=1,header=T,as.is=T)
close(z)

this code seems temperamental and seems to work if you play around with
open(z) and isOpen(z) eventually ...

otherwise I get the error:

Error in readLines(file, skip) : seek not enabled for this connection

If anybody could offer advice?

Regards,

John Marsland


********************************************************************** 
This is a commercial communication from Commerzbank AG.\ \ T...{{dropped}}