All, I have made it as far as generating an api call which returns the following xml [1] "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<observations realtime_start=\"2015-09-03\" realtime_end=\"2015-09-03\" observation_start=\"2015-09-01\" observation_end=\"2015-09-01\" units=\"lin\" output_type=\"1\" file_type=\"xml\" order_by=\"observation_date\" sort_order=\"asc\" count=\"1\" offset=\"0\" limit=\"100000\">\n <observation realtime_start=\"2015-09-03\" realtime_end=\"2015-09-03\" date=\"2015-09-01\" value=\"0.46\"/>\n</observations>\n\n\n\n" attr(,"Content-Type") charset "text/xml" "UTF-8"
following DTL's presentation on the Berkley site and the package help I parsed the xml doc = xmlTreeParse(USSW10, asText = TRUE, useInternal = TRUE) which gives <?xml version="1.0" encoding="utf-8"?> <observations realtime_start="2015-09-03" realtime_end="2015-09-03" observation_start="2015-09-01" observation_end="2015-09-01" units="lin" output_type="1" file_type="xml" order_by="observation_date" sort_order="asc" count="1" offset="0" limit="100000"> <observation realtime_start="2015-09-03" realtime_end="2015-09-03" date="2015-09-01" value="0.46"/> </observations> finally I try to extract the value 0.46 using the xmlValue function. I have lost something in translation and I am unable to extract the value. my understanding is I have one node with no children, correct? -Glenn ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
