Hi Simon
Unfortunately, it works for me on my OS X machine. So I can't reproduce the
problem.
I'd be curious to know which version of libxml2 you are using. That might be
the cause
of the problem.
You can find this with
library(XML)
libxmlVersion()
You might install a more recent version (e.g. libxml = 2.07.0)
You can send the info to me off list and we can try to resolve the problem.
htmlParse() returns a reference to the internal C-level XML tree/document.
When you print the value of the variable .x, we then serialize that C-level
data structure
to a string.
htmlTreeParse(), by default, converts that C-level XML tree/document into
regular R objects.
So it traverses the tree and creates those R list()s before it returns and then
throws the
C-level tree away.
D.
On 9/5/11 2:48 PM, Simon Kiss wrote:
Dear colleagues,
each time I use htmlParse, R crashes or hangs. The url I'd like to parse is
included below as is the results of a series of basic commands that describe
what I'm experiencing. The results of sessionInfo() are attached at the
bottom of the message.
The thing is, htmlTreeParse appears to work just fine, although it doesn't
appear to contain the information I need (the URLs of the articles linked to
on this search page). Regardless, I'd still like to understand why htmlParse
doesn't work.
Thank you for any insight.
Yours,
Simon Kiss
myurl-c(http://timesofindia.indiatimes.com/searchresult.cms?sortorder=scoresearchtype=2maxrow=10startdate=2001-01-01enddate=2011-08-25article=2pagenumber=1isphrase=noquery=IIMsearchfield=section=kdaterange=30date1mm=01date1dd=01date1=2001date2mm=08date2dd=25date2=2011;)
.x-htmlParse(myurl)
class(.x)
#returns HTMLInternalDocument XMLInternalDocument
.x
#returns
*** caught segfault ***
address 0x1398754, cause 'memory not mapped'
Traceback:
1: .Call(RS_XML_dumpHTMLDoc, doc, as.integer(indent),
as.character(encoding), as.logical(indent), PACKAGE = XML)
2: saveXML(from)
3: saveXML(from)
4: asMethod(object)
5: as(x, character)
6: cat(as(x, character), \n)
7: print.XMLInternalDocument(pointer: 0x11656d3e0)
8: print(pointer: 0x11656d3e0)
Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace
sessionInfo()
R version 2.13.0 (2011-04-13)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] en_CA.UTF-8/en_CA.UTF-8/C/C/en_CA.UTF-8/en_CA.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] XML_3.4-0 RCurl_1.5-0bitops_1.0-4.1
*
Simon J. Kiss, PhD
Assistant Professor, Wilfrid Laurier University
73 George Street
Brantford, Ontario, Canada
N3T 2C9
Cell: +1 905 746 7606
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and provide commented, minimal, self-contained, reproducible code.
