Ok.
After generating a long graph, I use linspace function to generate positions
for the main paths of the graph. So I fixed these positions using the pin
property. But after calling the function sfdp_layout all positions are
changed. Is this the expected behavior? I presented the results in the
previous post. Here is my relevant code:
pin = g.new_vertex_property("bool")
pos = g.new_vertex_property("vector<double>")
v_c = g.new_vertex_property("double")
v_s = g.new_vertex_property("int")
# I created a graph with 11000 nodes.
# setting positions for the main path
position = np.linspace(0.0, 12.0, main_path_size)
for i,idx in enumerate(main_path_i):
pin[g.vertex(idx)] = True
pos[g.vertex(idx)] = (0, position[i])
v_c[g.vertex(idx)] = 50 # color
v_s[g.vertex(idx)] = 10 # size
# setting positions for the second main path
position = np.linspace(0.0, 12.0, sec_path_size)
for i,idx in enumerate(sec_path_i):
pin[g.vertex(idx)] = True
pos[g.vertex(idx)] = (position[i], 12.0)
v_c[g.vertex(idx)] = 250 # color
v_s[g.vertex(idx)] = 10 # size
# setting positions for the thirmain path
position = np.linspace(0.0, 12.0, thi_path_size)
for i,idx in enumerate(thi_path_i):
pin[g.vertex(idx)] = True
pos[g.vertex(idx)] = (-position[i], 12.0)
v_c[g.vertex(idx)] = 350 # color
v_s[g.vertex(idx)] = 10 # size
# calling the layout function
pos = gt.sfdp_layout(g, pin=pin, pos=pos)
gt.graph_draw(g, pos, output_size=(1000, 1000), vertex_fill_color=v_c,
vertex_size=v_s, vcmap=mat.cm.jet, output='mxt.png', fmt='png')
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