xmlTreeParse

Thanks, Simon.

XML installs just fine.  The problem comes when I do:
[R version 2.15.0 (2012-03-30)]

library(XML)
url <- "http://stats.grok.se/en/201204/Financial_crisis"

wikitree <- xmlTreeParse(url, useInternalNodes=T)
url <- "http://stats.grok.se/en/201204/Financial_crisis"

wikitree <- xmlTreeParse(url, useInternalNodes=T)

AttValue: " or ' expected
attributes construct error
Couldn't find end of Start Tag link line 11
Opening and ending tag mismatch: hr line 57 and body
Opening and ending tag mismatch: body line 48 and html
Premature end of data in tag html line 3
Error: 1: AttValue: " or ' expected
2: attributes construct error
3: Couldn't find end of Start Tag link line 11
4: Opening and ending tag mismatch: hr line 57 and body
5: Opening and ending tag mismatch: body line 48 and html
6: Premature end of data in tag html line 3

This pinpoints the error that I get when I try to run the function wikiStat() from:
http://expansed.com/2011/08/visualising-wikipedia-search-statistics-with-r/

critraffic <- wikiStat("Financial_crisis", monback = 40)
Loading required package: mondate

Attaching package: 'mondate'

The following object(s) are masked from 'package:base':

   cbind, rbind

AttValue: " or ' expected
attributes construct error
Couldn't find end of Start Tag link line 11
Opening and ending tag mismatch: hr line 57 and body
Opening and ending tag mismatch: body line 48 and html
Premature end of data in tag html line 3
Error: 1: AttValue: " or ' expected
2: attributes construct error
3: Couldn't find end of Start Tag link line 11
4: Opening and ending tag mismatch: hr line 57 and body
5: Opening and ending tag mismatch: body line 48 and html
6: Premature end of data in tag html line 3

I can use Safari to access the url
http://stats.grok.se/en/201204/Financial_crisis
without problem.

Incidentally, I get the same result under Windows 7 (R-2.14.2 or R-2.15.0).
If I am right in thinking that I have to sort out issues of 3rd party libraries to get the
function to run, I prefer to do this for OS 10.7.x, if at all possible.

It is of course possible that there has been some change at the url since wikiStat()
was posted, of which I need to take account.

NB also a later article that uses this function:
http://expansed.com/2011/08/r-popularity-steady-growth-and-new-york-times/
( ar <- wikiStat("R_(programming_language)", monback = 45, lang= 'en') )

John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Mathematics & Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm

On 18/04/2012, at 12:10 PM, Simon Urbanek wrote:

John,

what's wrong with
install.packages("XML")
library(XML)
It works just fine on Lion ...

Cheers,
Simon


On Apr 17, 2012, at 9:51 PM, John Maindonald wrote:

I am looking for clues on getting xmlTreeParse(), from the XML package,
working under Lion.  The help page has the note:
'Make sure that the necessary 3rd party libraries are available.'

I take it that these are the libraries that are noted at:
http://www.explain.com.au/oss/libxml2xslt.html

The page does not have any details for anything past Leopard.  Any
comments on what is needed for Lion will be helpful.  I'd been hoping
to run the code for the function wikiStat() that is given at:
http://expansed.com/2011/08/visualising-wikipedia-search-statistics-with-r/

I will be grateful for any clues.

John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Mathematics & Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm