Example of flowchart using mermaid (You don't need to use this, draw.io also has this)

flowchart LR
  is_seedpnodes_list{Is seed p nodes list} -->|Yes| B
  is_seedpnodes_list -->|No| C

The ideal function should have:

• Allow passing a list for some of the arguments, in which case it assumes a multi-behavior model.
• Arguments are are not passed as list, should be recycled, e.g., if seed.p.nodes is a list but seed.nodes as a vector (indicating seed vertices), then the program should do something like seed.nodes <- list(seed.nodes, seed.nodes)

Need to think about the sim process.

For the preprocessing, you could have something like this:

rdiffnet_validate_args <- function(seed.p.nodes, seed.nodes, behavior) {
   ... do all the checks to validate length and stuff ...
   list(
     seed.p.nodes = ...,
     seed.nodes = ...,
     behavior = ...,
     num_of_behaviors = ...
   )
}

rdiffnet <- function( ... ) {
  
    validated_args <- rdiffnet_validate_args(seed.p.nodes, seed.nodes, behavior)

    ....

    # if you want to use seed.p.nodes
    validated_args$seed.p.nodes
}