R Tutorial Playlist - XML

XML is very useful format for the purpose of data transfer. In here we are going to deal with two packages for xml manipulation; XML and xml2.

In case of xml2 library, first we have to import library itself.

 library("xml2")

then in order to read content of file with path a into xml structure, we have to use function read_xml

xml <- read_xml(a)

now, in order to get list of all xml children, use function xml_children like in case:

x <- xml_children(xml)

If you want to access elements of particular child from your xml structure, do it in this way

first <- xml_children(xml[1])

Finally with function of xml_text, you have to provide argument of xml child you want to get value from.

text <- xml_text(first[1])

And if attribute of that child is about, this is the way.

attr <- xml_attr(x[1], b)

Where b is path to file with xml content.

And there is second interesting library and that is xml

library("xml")

xml <- xmlToDataFrame(a)

where a is path to file with xml content.

For video tutorial, check link below.