Cheers, I managed to get the colours consistent with your suggestion. One more thing I forgot to ask in my original post, is there a way to display a colour legend with the graph plot?

On Fri, 26 Feb 2016 at 11:54 Joel Moberg <joel.moberg@gmail.com> wrote:
You can use matplotlib and a colormap for this. I think you need to create a vp that's only for the colors, the documentation says which types are accepted for colors. You can get a color with a cmap by pasing a value from 0 - 1.

See this example for using a cmap:

import matplotlib.pyplot as plt
cmap = plt.get_cmap('cool')
cmap(0.4)
(0.40000000000000002, 0.59999999999999998, 1.0, 1.0)


On Fri, Feb 26, 2016 at 12:35 PM, Alexandra Diem <alexandra.diem@gmail.com> wrote:
Hi,
I'm trying to use graph-tool to track concentrations on a network and was wondering what the best way would be to obtain consistent colour scales for a vertex property? I track the concentration of a substance as a vertex property and then use that as the vertex_fill_color in graph_draw because I would like to visualise the change in concentration over the network over time. This works great, but it appears that every time I plot the graph the colormap is rescaled to the minimum and maximum values in the vertex property. So if my values range from 0.0 to 0.4 and I use the Blues colormap 0.0 is white and 0.4 is dark blue. If in the next time step my values range from 0.0 to 0.6 then 0.6 is dark blue and 0.4 is now a different shade of blue. Instead, if I know 0.0 would be the minimum value and 1.0 would be the maximum I would like to consistently plot my graphs using that scaling, so that 0.4 always has the same shade of blue. I hope this all made sense.
Thanks!
Alexandra

_______________________________________________
graph-tool mailing list
graph-tool@skewed.de
http://lists.skewed.de/mailman/listinfo/graph-tool


_______________________________________________
graph-tool mailing list
graph-tool@skewed.de
http://lists.skewed.de/mailman/listinfo/graph-tool