getAlternativesValues: Get values related to alternatives
In RXMCDA: Functions to Parse and Create XMCDA Files

Description Usage Arguments Value Examples

Gets values related to alternatives, stored in the <alternativesValues> tag, from an XML tree written according to the XMCDA standard.

1	getAlternativesValues(tree, alternativesIDs, mcdaConcept = NULL)

`tree`	Object containing the `XMCDA` XML tree.
`alternativesIDs`	A vector containing the IDs of the alternatives to be considered for the extractions.
`mcdaConcept`	A string containing the specific `mcdaConcept` attribute which should be searched for.

The function returns a list structured as follows:

–

The first elements contain matrices representing each an <alternativesValues>. Each line of each matrix corresponds to an element of the type "the value assigned to alternative a is x". A line is structured as follows: the first element encodes the index of the ID of alternative a in alternativesIDs, the second element encodes the value x. These elements are named according to the mcdaConcept attribute if it can be found.

status

Either OK if all the <alternativesValues> tags could be correctly read, or the description of the error.

tree <- xmlTreeParse(system.file("extdata",
                                 "testFile.xml",
                                 package="RXMCDA"),
                     useInternalNodes=TRUE)

altIDs <- getAlternativesIDs(tree)

altVals <- getAlternativesValues(tree, altIDs[[1]])