plotMethods_utils.R

This function contains only one function: splitMatrix(), used in support of the plot method plot.EpiNet().

splitMatrix()

Summary: This function takes an incidence matrix for a hypergraph and splits it into a list of incidence matrices per order of interaction.

Arguments

• mm: an incidence matrix

Returns

splitMatrix() returns a list of matrices, one per order of interaction.

Algorithm

1. Set all elements in mm to 0 or 1
2. Get a vector of the number of nodes for each column of mm
3. Reduce the vector to a sorted vector of unique values greater than 1
4. For each value in the vector
   1. Create a matrix from the columns of mm that contain that many nodes
   2. Store the matrix in a list
5. Return the list