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我想获得'summary_doc'
但收到错误。我该怎么办。为什么我得到该错误:XML内容似乎不是XML
代码如下
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library(XML)
base_url = "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/"
db = "pubmed"
query = "human+genome+AND+2014"
esearch = sprintf("esearch.fcgi?db=%s&term=%s",db,query)
search_url = paste(base_url, esearch, sep="")
search_doc = xmlParse(search_url)
retmax = 9000
new_esearch = sprintf("esearch.fcgi?db=%s&term=%s&retmax=%s",db,query,retmax)
new_search_url= paste(base_url,new_esearch,sep='')
new_search_doc = xmlParse(new_search_url)
ids = xpathSApply(new_search_doc,path="//IdList/Id",fun='xmlValue')
id_list = paste(ids, coppapse=',')
esummary = sprintf("esummary.fcgi?db=%s&id=%s",db, id_list)
sum_url = paste(base_url, esummary, sep='')
summary_doc = xmlParse(sum_url) #this line makes error
Error: XML content does not seem to be XML:
谢谢你的回答。这对我真的很有帮助。 但有另一个问题。 问:我可以看到'doc'文件吗? 还有一个我真的很感谢你的回答。 – user4329049 2014-12-06 13:08:40