[R] How to download and unzip data in a loop

[jim holtman]

try taking the quotes off of 'files'


Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

On Wed, Feb 4, 2015 at 5:24 PM, Alexandra Catena <amc5981 at gmail.com> wrote:

> Hi All,
>
> I need to loop through and download the past 10 years of met data to a
> temporary directory.  I then need to unzip it and place it into another
> directory.
>
>
> year = (2005:2015)
>
> for (i in year)
>   tmpdir = tempdir()
>   file[i] = file.path(tmpdir, sprintf('724927-23285-%4i.gz', i))
>   url = sprintf('
> ftp://ftp.ncdc.noaa.gov/pub/data/noaa/%4i/724927-23285-%4i.gz', i, i)
>   #file = basename(url)
>   download.file(url, file[i])
>   files = dir(tmpdir, '*.gz', full.names=FALSE)
>   read.table(gzfile('files'))
>
>
>
> 'file' returns 2015 indices with "/tmp/RtmpKvB4Wz/724927-23285-2015.gz"
> next to 2015. and files returns 724927-23285-2015.gz.  However, when I try
> to unzip the gz file using the last line, it says it cannot open the
> connection and the probable reason is that there is no such file or
> directory.
>
>
>
> Thanks,
> Alexandra
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>

	[[alternative HTML version deleted]]