Hi, could you please tell me more about the learn_struct_tan function, right now it just says: learn_struct_tan(app, class, root, node_sizes)
data(i,m) is the value of node i in case m
class_node is the class node
root is the root node of the tree part of the dag (must be different from the class node)
node_sizes = 1 if gaussian node,
scoring_fn = 'bic' (default value) or 'mutual_info'
So what is the data and the app, and why it says the node(i,m)?