XML - get node by name
Thanks a lot to Gabor and Duncan! I didn't know that XPath is a standard. I'll give it a deeper look to better understand it. Oh, I guess I understand a bit more xpathApply(doc, "//val", function(n) xmlValue(n)) would search globally for all nodes named "val" and return its values :-) So that's excactly what I was looking for. Not caring about the exact location of a node. I think, in my case it should be okay, to parse for nodes just by their names. Thanks again! @ Ajay: Sorry, but I was looking for a solution with R @ Dirk: I already used the XML package but didn't know the possibilities to access data as I was used to. Antje schrieb:
Hi there,
I try to rewrite some Java-code with R. It deals with reading XML files.
I started with the XML package. In Java, I had a very useful method
which gave me a node by using:
name of the node
index of appearance
start point: global (false) / local (true)
So, I could do something like this.
setCurrentChildNode("data", 0);
getValueOfElement("val",1,true);
--> gives 45
setCurrentChildNode("data", 1);
getValueOfElement("val",1,true);
--> gives 11
getValueOfElement("val",1,false);
--> gives 45
<root>
<data loc="1">
<val i="t1"> 22 </val>
<val i="t2"> 45 </val>
</data>
<data loc="2">
<val i="t1"> 44 </val>
<val i="t2"> 11 </val>
</data>
</root>
Now, I'd like to do something like this in R. Most important would be to
retrieve a node just by its name, not by the whole path. How is it
possible?
Can anybody help me with this issue?
Antje
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