Vincent Traag vtraag

🏡

I may be slow to respond.

Senior Researcher @CWTSLeiden. Computational social sciences, science studies, modelling & networks. Math & sociology.

vtraag / Onename

Created November 13, 2015 21:06

Verifying that +vtraag is my blockchain ID. https://onename.com/vtraag

vtraag / pgf_horizontal_line.tex

Created July 23, 2015 13:01

	# Create horizontal line from axis border to axis border.
	\draw[thick,color=black]
	({axis cs:0,1}-\|{rel axis cs:0,0}) --
	({axis cs:0,1}-\|{rel axis cs:1,0});

vtraag / permute_sparse_matrix.py

Last active December 18, 2024 22:33

Permute sparse matrix in Python using scipy COO format

	def permute_sparse_matrix(M, order):
	permuted_row = order[M.row];
	permuted_col = order[M.col];
	new_M = sparse.coo_matrix((M.data, (permuted_row, permuted_col)), shape=M.shape);
	return new_M;

vtraag / get_sparse_adjacency_matrix.py

Last active January 29, 2017 15:07

Create sparse matrix from igraph in python

	def get_sparse_adjacency_matrix(G, attr=None):
	if attr:
	source, target, data = zip(*[(e.source, e.target, e[attr])
	for e in G.es if not np.isnan(e[attr])]);
	else:
	source, target = zip(*[(e.source, e.target)
	for e in G.es]);
	data = np.ones(len(source)).astype('int').tolist();
	if not G.is_directed():
	# If not directed, also create the other edge