For a given ChEBI ID, find all ChEBI sub IDs (incoming IDs) and their sub IDs. The type of relationship can be selected too. This is a helper function for other functions.
find_all_subs(data, ids, types = "is_a")
a data frame that contains relational information on ChEBI IDs (id), their sub
IDs (incoming) and their relationship (type). This data frame can be obtained by calling
a character vector of ChEBI IDs for which sub IDs should be searched.
a character vector containing the types of relationships that should be considered for the search. It is possible to use "all" relationships. The default type is "is_a". A list of possible relationships can be found here.
A list of double vectors containing the provided ID and all of its sub IDs. It contains one element per input ID.