Scillieri, John wrote: > Looks like you can sign up to get XML feed data from Weather.com > > http://www.weather.com/services/xmloap.html >
... and use the excellent R package XML by Duncan Temple Lang to parse the document and easily access the data with, e.g.., XPath rather than regular expressions. vQ > Hope it works out! > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of James Muller > Sent: Thursday, February 26, 2009 3:57 PM > To: r-help@r-project.org > Subject: Re: [R] Download daily weather data > > Thomas, > > Have a look at the source code for the webpage (ctrl-u in firefox, > don't know in internet explorer, etc.). That is what you'd have to > parse in order to get the forecast from this page. Typically when I > parse webpages such as this I use regular expressions to do so (and I > would never downplay the usefulness of regular expressions, but they > take a little getting used to). There are two parts to the task: find > patterns that allow you to pull out the datum/data you're after; and > then write a program to pull it/them out. Also, of course, download > the webpage (but that's no issue). > > I bet you'd be able to find a comma separated value (CSV) file > containing the weather report somewhere, which would probably involve > a little less labor in order to produce your automatic wardrobe > advice. > > James > > > > On Thu, Feb 26, 2009 at 3:47 PM, Thomas Levine <thomas.lev...@gmail.com> > wrote: > >> I'm writing a program that will tell me whether I should wear a coat, >> so I'd like to be able to download daily weather forecasts and daily >> reports of recent past weather conditions. >> >> The NOAA has very promising tabular forecasts >> (http://forecast.weather.gov/MapClick.php?CityName=Ithaca&state=NY&site=BGM&textField1=42.4422&textField2=-76.5002&e=0&FcstType=digital), >> but I can't figure out how to import them. >> >> Someone must have needed to do this before. Suggestions? >> >> Thomas Levine! >> >> ______________________________________________ >> R-help@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. >> >> > > ______________________________________________ > R-help@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. > >>>> This e-mail and any attachments are confidential, may contain legal, >>>> professional or other privileged information, and are intended solely for >>>> the addressee. If you are not the intended recipient, do not use the >>>> information in this e-mail in any way, delete this e-mail and notify the >>>> sender. CEG-IP1 >>>> > > ______________________________________________ > R-help@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. > ______________________________________________ R-help@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.
