R newbie, experienced software developer. I have a bit of confusion regarding using this function. See the XML fragment at the end of the post.
This works as far as retrieving the nodeset: > fileName <- '/home/tim/MLHIM/git/EpiS3/test_ccd/inst/examples/001.xml' > doc <- xmlInternalTreeParse(fileName)> nodes <- > getNodeSet(doc,'//ccd:el-e3657392-8e26-42a4-a996-258f9e645c46')> > Connected_To=xmlToDataFrame(nodes) The result is: > str(Connected_To)'data.frame': 1 obs. of 7 variables: $ comment : Factor w/ 1 level " DvURI ": 1 $ data-name : Factor w/ 1 level "Connected To": 1 $ valid-time-begin: Factor w/ 1 level " Use any subtype of ExceptionalValue here when a value is missing": 1 $ valid-time-end : Factor w/ 1 level "2020-06-07T01:31:49Z": 1 $ DvURI-dv : Factor w/ 1 level "2009-01-20T08:40:53Z": 1 $ relation : Factor w/ 1 level "http://www.ccdgen.com": 1 $ NA : Factor w/ 1 level "connected to": 1 The line: $ valid-time-begin: Factor w/ 1 level " Use any subtype of ExceptionalValue here when a value is missing": 1 has a value that is a comment that occurs before the element. Then each value is shifted by one place with an extra one at the end. My desired solution would be to remove commenteds from the parsed tree. So I did this: > doc <- xmlInternalTreeParse(fileName, > handlers=list("comment"=function(x,...){NULL}), useInternalNodes = TRUE) But now when I attempt to get the nodes I get an error. > nodes <- getNodeSet(doc,'//ccd:el-e3657392-8e26-42a4-a996-258f9e645c46')Error > in UseMethod("xpathApply") : no applicable method for 'xpathApply' applied to an object of class "list" I am not sure what the error is telling me nor how to fix it. All suggestions are welcome and appreciated. Maybe I should be using a different approach to solving the issue with extracting the data.frame? Regads, Tim XML fragment: <ccd:el-e3657392-8e26-42a4-a996-258f9e645c46> <!-- DvURI --> <data-name>Connected To</data-name> <!-- Use any subtype of ExceptionalValue here when a value is missing--> <valid-time-begin>2020-06-07T01:31:49Z</valid-time-begin> <valid-time-end>2009-01-20T08:40:53Z</valid-time-end> <DvURI-dv>http://www.ccdgen.com</DvURI-dv> <relation>connected to</relation> </ccd:el-e3657392-8e26-42a4-a996-258f9e645c46> -- MLHIM VIP Signup: http://goo.gl/22B0U ============================================ Timothy Cook, MSc +55 21 994711995 MLHIM http://www.mlhim.org Like Us on FB: https://www.facebook.com/mlhim2 Circle us on G+: http://goo.gl/44EV5 Google Scholar: http://goo.gl/MMZ1o LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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.
