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 <- xmlTreeParse(getURL(paste(url, search, sep="")), useInternalNodes=TRUE) I want to fetch abstracts containing queryTerm1 AND queryTerm2 Or queryTerm3 OR queryTerm4. The code runs without error, but from the result I find that conjunction and disjunction is not working. Can anyone suggest a correct syntax for doing AND and OR pubmed query? Thanks John [[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.
