Random Graphs

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import warnings; warnings.simplefilter('ignore')

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@interact

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def _(nodes=[2,3,4,5],blocks=[15,10,5]):

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    s1='<left style=%s>Random Graph: '%'font-size:120;'

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    s2='%d Blockswith %d Nodes in a Block'

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    pretty_print(html(s1+s2%(blocks,nodes)))

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    g=graphs.RandomBlockGraph(blocks,nodes)

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    n=blocks*(nodes-1)+1; ec={}

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    [g.set_edge_label(u,v,u) for (u,v,l) in g.edges()]

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    c=[colormaps.jet(int(255/n)*i)[:3] 

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       for i in range(n)]

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    for i in range(n): ec[c[i]]=[] 

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    for (u,v,l) in g.edges():

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        [ec[c[i]].append((u,v,l)) 

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         for i in range(n) if (u!=v and l==i)] 

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    vc=dict(zip(c,[[i] for i in range(n)]))

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    g=g.graphplot(vertex_size=300,vertex_colors=vc,

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                  edge_colors=ec,layout='circular')

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    g.show(figsize=5)

Language: Sage Gap GP HTML Macaulay2 Maxima Octave Python R Singular

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