[R] Download daily weather data

[Wacek Kusnierczyk]

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-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of James Muller
> Sent: Thursday, February 26, 2009 3:57 PM
> To: r-help at 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.levine at 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!
>>
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>>
>>     
>
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