R: Applies a function to each of the children of an XMLNode

xmlApply {XML} | R Documentation

## Applies a function to each of the children of an XMLNode

### Description

These methods are simple wrappers for the `lapply` and `sapply` functions. They operate on the sub-nodes of the XML node, and not on the fields of the node object itself.

### Usage

    xmlApply(X, FUN, ...)
    ## S3 method for class 'XMLNode'
    xmlApply(X, FUN, ...)
    ## S3 method for class 'XMLDocument'
    xmlApply(X, FUN, ...)
    ## S3 method for class 'XMLDocumentContent'
    xmlApply(X, FUN, ...)
    xmlSApply(X, FUN, ...)
    ## S3 method for class 'XMLNode'
    xmlSApply(X, FUN, ...)
    ## S3 method for class 'XMLDocument'
    xmlSApply(X, FUN, ...)

### Arguments

`X` | the `XMLNode` on whose children the regular `apply` or `sapply` is to be performed
`FUN` | the function to apply to each child node. This is passed directly to the relevant `apply` function.
`...` | additional arguments to be given to each invocation of `FUN`. This is passed directly to the relevant `apply` function.

### Value

The result is that obtained from calling the `apply` or `sapply` on `xmlChildren(x)`.

### Author(s)

Duncan Temple Lang

### References

http://www.w3.org/XML, http://www.jclark.com/xml, http://www.omegahat.net

### See Also

`xmlChildren` `xmlRoot` `[.XMLNode` `sapply` `lapply`

### Examples

     doc <- xmlTreeParse(system.file("exampleData", "mtcars.xml", package="XML"))
     r <- xmlRoot(doc)
     xmlSApply(r[[2]], xmlName)

     xmlApply(r[[2]], xmlAttrs)

     xmlSApply(r[[2]], xmlSize)

[Package XML version 3.99-0.3 Index]