# Getting the coordinates from vertex property map

Guten Tag!

I am making the following example http://projects.skewed.de/graph-tool/wiki/FrontpageExample .

What I want to do is to extract the coordinates of the nodes into a list from the vertex property map (i.e. from the variable pos, I assume they are stored there). How do I do that? Please help me, because I am stuck on this problem for 2 days and I can't find the solution.

Best regards,
Kiril

attachment.html (1.66 KB)

You can either do:

coords = []
for v in g.vertices():
x, y = pos[v]
coords.append((x, y))

or the following if you want arrays:

x, y = ungroup_vector_property(g, [0, 1])
print(x.a) # array with x coordinates
print(y.a) # array with y coordinates

Cheers,
Tiago

Guten Tag!

I am making the following example
http://projects.skewed.de/graph-tool/wiki/FrontpageExample .

What I want to do is to extract the coordinates of the nodes into a
list from the vertex property map (i.e. from the variable pos, I
because I am stuck on this problem for 2 days and I can't find the
solution.

Best regards,
Kiril

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Hi,

In this case, if I recall well, the propery map |pos| has elements of