Re: [igraph] color of nodes according to a number

[Tamas Nepusz]

1) the color of nodes i and j has to be the same if array[i] == array[j]

 Use a ClusterColoringPalette and a UniqueIdGenerator -- the UniqueIdGenerator will be used to assign numeric identifiers to each of the groups of items in 'array', while the ClusterColoringPalette will be used to generate colors for them:

>>> id_gen = UniqueIdGenerator()

>>> color_indices = [id_gen.add(value) for value in array]

>>> palette = ClusterColoringPalette(len(id_gen))

>>> colors = [palette[index] for index in color_indices]

>>> graph.vs["color"] = colors

2) the color of edge ij has to be given according to this criterion:

    if( array[i] <= array[j] ):

        color_of_edge_ij = color_of_node_j

    else:

        color_of_egde_ij = color of node_j

for edge in graph.es:

    u, v = edge.tuple

    edge["color"] = colors[u if array[u] <= array[v] else v]

T.