xml parsing - How to convert nested list to xml Using R -


i've kml file , wanted add nodes @ specific place it, wrote code .. 

library(xml) kml.text <- readlines("c:/users/pc/downloads/googletraffic/maps/all maps.kml") xml_data <- xmltolist(kml.text)   top = newxmlnode("description")  table = newxmlnode("table ", attrs = c(width = 300, border = 1), parent = top) tbody <- newxmlnode("tbody",parent = tr) tr <- newxmlnode("tr",parent = table) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = max(all$traveltime),parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "md",parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "pm",parent = tr) tr <- newxmlnode("tr",parent = table) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = max(all$traveltime),parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "md",parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "pm",parent = tr) tr <- newxmlnode("tr",parent = table) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = max(all$traveltime),parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "md",parent = tr) th <- newxmlnode("th",attrs = c(scope = "col"),scope1 = "pm",parent = tr)  th <- newxmlnode("img",attrs = c(src = url,width = "700",height= "777",alt=""),parent =top )  top  description <- xmltolist(top) xml_data$document$folder$folder$folder$placemark$description <- description

that way found add html code specific position in xml code, when convert "top" "description" , structure of data got changed , become useless,so there way attached html code xml_data without converting "top" list ?

and got function convert nested list xml, problem code writen in html convert xml , not useful anymore.

root <- newxmlnode("root") listtoxml <- function(node, sublist){     for(i in 1:length(sublist)){         child <- newxmlnode(names(sublist)[i], parent=node);          if (typeof(sublist[[i]]) == "list"){             listtoxml(child, sublist[[i]])         }         else{             xmlvalue(child) <- sublist[[i]]         }     }  } listtoxml(root,xml_data)

this fuction written jeff allen @ link

so, please there way attach html code xml , when parsing list xml, html code still html , not convert xml ?

here's kml file

the htmltools package lets build out nested nodes , can use xmlparsestring() function nodes:

library(htmltools) library(magrittr)  tag("a", list(attr1="a1", attr2="a2",                tag("b", list(tag("c", list(attr1="c1", "c content")),                              "b content")),                "a content"))  %>%    tostring() %>%    xmlparsestring() %>%   str() ## classes 'xmlinternalelementnode', 'xmlinternalnode', 'xmlabstractnode' <externalptr>

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