io.sets_to_sparse

io.sets_to_sparse(S, reindex=False, form='csc')

Converts a collection of sets into a sparse array.

This function converts a Collection of integer-valued sequences into a sparse matrix, where each column represents a set and each row represents an element. Optionally, if the sets themselves do not represent 0-based indices, you can set reindex=True to map the elements to the base index set \([n] = {0, 1, ..., n - 1}\).

Parameters

Name	Type	Description	Default
S	Collection	Collection of indices representing subsets.	required
reindex	bool	whether to reindex the sets to the base index set. Default to False.	False

Returns

Type	Description
csc_array	sparse boolean array in canonical form.