get_edges_from_topology_file: Get the edges from a specified topology
Description
Use this function to read a topology .sif file (either space or tab-delimited)
and get a matrix of network edges specifying the source and target name, the
regulation effect (activation or inhibition) and the color (green or red) of
each interaction.
Usage
get_edges_from_topology_file(topology.file)
Arguments
topology.file
string. The name of the .sif file (can be a full path
name).
Value
a matrix with as many rows as in the .sif topology file (each row is
an edge) and 4 columns defining the source and target node name, the
regulation (activation or inhibition) and the color (green or red) of the
signed interaction.