Hi Chuck.
Well, here is one way
theURL =
"http://oasasapps.oasas.state.ny.us/portal/pls/portal/oasasrep.providersearch.take_to_rpt?P1=3489&P2=11490";
doc = htmlParse(theURL, useInternalNodes = TRUE,
error = function(...) {}) # discard any error messages
# Find the nodes in the table that are of interest.
x = xpathSApply(doc, "//table//td|//table//th", xmlValue)
Now depending on the regularity of the page, we can do something like
i = seq(1, by = 2, length = 3)
structure(x[i + 1], names = x[i])
And we end up with a named character vector with the fields of interest.
The useInternalNodes is vital so that we can use XPath. The XPath
language is very convenient for navigating subsets of the resulting
XML tree.
D.
Chuck Cleland wrote:
Hi All:
I would like to extract the provider name, address, and phone number
from multiple webpages like this:
http://oasasapps.oasas.state.ny.us/portal/pls/portal/oasasrep.providersearch.take_to_rpt?P1=3489&P2=11490
Based on searching R-help archives, it seems like the XML package
might have something useful for this task. I can load the XML package
and supply the url as an argument to htmlTreeParse(), but I don't know
how to go from there.
thanks,
Chuck Cleland
sessionInfo()
R version 2.8.0 Patched (2008-12-04 r47066)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] XML_1.98-1
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