Hi, I think I've found a bug. Basically I'm trying to use vertex_size with graph_draw() using a GraphView, but it only seems to work with the original graph. import graph_tool.all as gt from numpy.random import randint, random from itertools import izip N = 50 g = gt.Graph() g.add_vertex(N) # insert some random links for s,t in izip(randint(0, N, N), randint(0, N, N)): g.add_edge(g.vertex(s), g.vertex(t)) vsize = g.new_vertex_property('float') vsize.a = random(N)**2 vsize = gt.prop_to_size(vsize) vsize.a *= 10 # this works gt.graph_draw(g, vertex_size=vsize) gv = gt.GraphView(g, vfilt=lambda v:v.out_degree()>1) # this doesn't gt.graph_draw(gv, vertex_size=vsize) The traceback is: /usr/lib/python2.7/dist-packages/graph_tool/draw/cairo_draw.pyc in get_bb(g, pos, size, pen_width, size_scale, text, font_family, font_size, cr) 1279 x_range = [pos_x.fa.min(), pos_x.fa.max()] 1280 y_range = [pos_y.fa.min(), pos_y.fa.max()] -> 1281 x_delta = [x_range[0] - (pos_x.fa - delta).min(), 1282 (pos_x.fa + delta).max() - x_range[1]] 1283 y_delta = [y_range[0] - (pos_y.fa - delta).min(), ValueError: operands could not be broadcast together with shapes (13,) (50,) Thanks, -Rick