| foodweb | Create a foodweb |
| foodweb_matrix | Create a function caller/callee matrix |
| get_funmat | Extract the function matrix from a 'foodweb' object. |
| get_graphviz_spec | Extract the GraphViz specification from a 'foodweb' object. |
| graphviz_spec_from_matrix | Create a 'graphviz' specification from a function matrix |
| is.foodweb | Is an object a 'foodweb'? |
| print.foodweb_matrix | Print a 'foodweb_matrix' |