similar to: getNodeSet - what am I doing wrong?

Hello everyone, I would like to parse very large xml files from MS/MS experiments and create R objects from their content. (By very large, I mean going up to 5-10Gb, although I am using a 'small' 40M file to test my code.) My first attempt at parsing the 40M file, using the XML package, took more than 2200 seconds and left me quite disappointed. I managed to cut that down to around 40

Dear all, for my diploma thesis I have to import huge XML-Files into R for statistical processing - huge means a size about 33 MB. I'm using the XML-Package version 1.9 As far as reading the complete file into R via xmlTreeParse doesn't work or is too slow, I'm trying to use xmlEventParse but I got completely stuck. I have many different type of nodes + <configuration>

Hey, I have an double loop like this: chunk <- list(1:10, 11:20, 21:30) for(k in 1:length(chunk)){ print(chunk[k]) DummyCatcher <- NULL for(i in chunk[k]){ print("i load something") dummy <- 1 print("i do something") dummy <- dummy + 1 print("i do put it together") DummyCatcher = rbind(DummyCatcher, dummy) } print("i save a chunk

Can't seem to get the code below working. It gets stuck on line 24 inside the function hm; comments show the line in question. The function hm is called by sapply and is at the bottom of the code. Other stuff above line 24 works correctly including the first couple of lines of the function hm. Should I be using a different apply function or am I doing something wrong with xmlTreeParse ?

Hello again, Another stumble here that is defeating me. I try: a<-readLines(url("http://feeds.feedburner.com/grokin")) t<-XML::xmlTreeParse(a, ignoreBlanks=TRUE, replaceEntities=FALSE, asText=TRUE) elem<- XML::getNodeSet(XML::xmlRoot(t),"/rss/channel/item")[[1]] And I get: Start tag expected, '<' not found Error: 1: Start tag expected, '<' not

Hi, I'm new to R, and found this code confusing. It is from the bioconductor package "RpsiXML". entryCount <- length(nodes) The "nodes" object is either the argument nor generated in the function. How can R find the "nodes" object? What am I missing here? Thanks Zheng Jk parseXmlEntryNodeSet <- function(psimi25file, psimi25source, verbose=TRUE) {

Hi, I have an XML file which contains among other nodes : ===myXMLfile.xml=== (?) <nbRelations>2</nbRelations> <nbActors>2</nbActors> (...) <nbRuns>5</nbRuns> <nbStep>2000</nbStep> (?) ===End file=== I need to extract those values and to make them R variables such as: nbRelations = 2 nbActors = 2 nbRuns = 5 nbSteps = 2000 I read the help and have

I have one XML file with 30MB that I need to read the data. I try this; library(XML) doc <- xmlDoc("Malaria_Grave.xml") And R answers like this *** caught segfault *** address 0x5, cause 'memory not mapped' Traceback: 1: .Call("RS_XML_createDocFromNode", node, PACKAGE = "XML") 2: xmlDoc("Malaria_Grave.xml") Possible actions: 1: abort (with

Hi, I'm trying to use the XML package to read an RSS feed. To get started, I was trying to use this post as an example: http://www.r-bloggers.com/how-to-build-a-dataset-in-r-using-an-rss-feed-or-web-page/ I can replicate the beginning section of the post, but when I try to use another RSS feed I have an issue. The RSS feed I would like to use is: > URL <-

I would like to track in which journals articles about a particular disease are being published. Creating a pubmed search is trivial. The search provides data but obviously not as an R dataframe. I can get the search to export the data as an xml feed and the xml package seems to be able to read it. xmlTreeParse("

I am looking for the syntax to capture XML tags marked with /DescriptorName MajorTopicYN="Y"/ , but the combination of the internal space (between "Name" and "Major" and the embedded quote marks are defeating me. I can get all the "DescriptorName" tags, but these include both MajroTopicYN = "Y" and "N" variants. Any suggestions?

Dear list I tried to read an xml file using the xml package. Unfortunately, some encoding problems occure. E.g. german Umlaut will be red correctly. I assume that the occurs due to (internal?) conversion to utf-8. To illustrate the problem, I have wrote to xml files. File Test 1 ----------- <?xml version="1.0" encoding="ISO-8859-1"?> <Daten> <ITEM>

Is there any function to write a XML structure, after it was read using xmlTreeParse? Ex: library(XML) x <- xmlTreeParse("Irpf2008/aplicacao/dados/12345678901/12345678901.xml") # write it... Alberto Monteiro PS: please, brazilians, don't be offended by my foul language!

Dear, I want to read XML documents, add child nodes to some elements and store everything back as an XML document. I've tryed the following: doc <- xmlTreeParse("file.xml") QTListNode<-xmlElementsByTagName(xmlRoot(doc)[[1]],"tagname") append.xmlNode(QTListNode[[1]],newXMLNode(name ="Norm", attrs = NULL)) saveXML(doc, file = "out.xml",

Hi, I found an architecture-specific segfault problem with the XML package. I originally found the problem using the parseKGML2Graph function in the Bioconductor KEGGgraph package, but as far as I can tell the underlying issue seems to be with the xmlTreeParse which is called by parseKGML2Graph. I'm trying this piece of code, from the xmlTreeParse help page: library(XML) fileName <-

Hi, I have an existing XML document on disk, which I'd like to use as a template, and exchange a subnode with my own newly created subtree: <?xml version="1.0"?> <Duncan> <name a="1" b="xyz"> <first>Duncan</first> <last>Temple Lang</last> </name> </Duncan> created by e.g. ? library(XML)

I'm struggling with package XML to parse a Garmin file (named *.tcx). I wonder if it's form is incomplete, but appreciably reluctant to paste even a shortened version. The output below shows I can get nodes, but an attempt at value of a single node comes up empty (even though there is data there. One question: Has anybody succeeded parsing Garmin .tcx (xml) files? Thanks! Michael

Hi: I am trying to search PubMed abstracts which contains BOTH two terms: COL4A1 AND Ocular. I am using the following code: url= "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?" search = paste(url, "db=pubmed&term=COL4A1+AND+Ocular[abstract]&retmax=300", sep="") docId <- xmlTreeParse(getURL(paste(url, search, sep="")),

Hi: I am trying to query pubmed abstracts using the following syntax: url= "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?" search = paste(url, "db=pubmed&term=", queryTerm1, "+AND+", queryTerm2,"+OR+",queryTerm3, "+OR+", queryTerm4, "[abstract]&retmax=100&usehistory=y", sep="") docId <-

Hi, I'm looking for help extracting some information of the zillow website. I'd like to do this for the general case where I manually change the address by modifying the url (see code below). With the url containing the address, I'd like to be able to extract the same information each time. The specific information I'd like to be able to extract includes the homedetails url, price