Am 29.03.21 um 15:53 schrieb Rodrigo Leal Cervantes:
Say for example that I'm storing the 2D coordinates of the vertices inside the
vp `pos`. `g.vp.pos.a` returns `None`, and the way I typically convert this to
an array is
```
print(g.vp.pos)
# <VertexPropertyMap object with value type 'vector<double>', for Graph
0x7f02f04d34f0, at 0x7f0297d164f0>
pos = np.array(list(g.vp.pos))
print(pos.shape) # (100, 2)
```
but I wonder if there is a better way to do this. What do other people use in
this case?
Yes, take a look at:
https://graph-tool.skewed.de/static/doc/graph_tool.html#graph_tool.PropertyMap.get_2d_array
This means you can do:
a = g.vp.pos.get_2d_array([0, 1])
The reason why this is needed is because vector properties are *not*
internally stored as contiguous 2D arrays.
Best,
Tiago
--
Tiago de Paula Peixoto <ti...@skewed.de>
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