graph-drawing

I'm trying to understand these two methods of the Bitmap or Image. One being .SetPropertyItem() and the other being .GetPropertyItem() . I'm completely confused as to the way the documentation says that I am to set a property item. From the Microsoft Documentation it is stating that we should choose a property item by an id of a property item that already exist in the image, give that property item a new ID, set the properties and then set the image property item with that retrieved property item. That is so weird, but what really gets me is that we cannot just set the id of the property item

I'd like to programmatically create diagrams like this (source: yaroslavvb.com ) I imagine I should use GraphPlot with VertexCoordinateRules, VertexRenderingFunction and EdgeRenderingFunction for the graphs. What should I use for colored beveled backgrounds? Edit Using mainly Simon's ideas, here's a simplified "less robust" version I ended up using Needs["GraphUtilities`"]; GraphPlotHighlight[edges_, verts_, color_] := Module[{}, vpos = Position[VertexList[edges], Alternatives @@ verts]; coords = Extract[GraphCoordinates[edges], vpos]; (* add .002 because end-cap disappears when segments are

Hey I want to draw a graph(Stdent mark distribution) in my site based on PHP. How can I do this? pChart is another great PHP graphing library. <? # ------- The graph values in the form of associative array $values=array( "Jan" => 110, "Feb" => 130, "Mar" => 215, "Apr" => 81, "May" => 310, "Jun" => 110, "Jul" => 190, "Aug" => 175, "Sep" => 390, "Oct" => 286, "Nov" => 150, "Dec" => 196 ); $img_width=450; $img_height=300; $margins=20; # ---- Find the size of graph by substracting the size of borders $graph_width=$img_width - $margins * 2; $graph_height=$img_height - $margins * 2; $img=imagecreate

Does anyone have any general tips for reducing the size of a graph generated by graphviz (size as in area, not as in file size). I have a fairly large graph (700 nodes). I set a smaller font size for each node, but it seems to only reduce the font size and not the actual node size. Are there any attributes to reduce the overall amount of blank space in the graph also? Thanks! doug In my experience using graphviz to render graphs of that size (~ 700 nodes), minimal trial-and-error adjustment to this combination of attribute settings--some structural, some purely aesthetic--for all three objects

Drawing a clique graph with import networkx as nx .... nx.draw(G, layout=nx.spring_layout(G)) produces the following picture: Obviously, the spacing between the nodes (e.g., the edge length) needs to be increased. I've googled this and found this suggestion here: For some of the layout algorithms there is a scale parameter that might help. e.g. import networkx as nx G = nx.path_graph(4) pos = nx.spring_layout(G) # default to scale=1 nx.draw(G, pos) pos = nx.spring_layout(G, scale=2) # double distance between all nodes nx.draw(G, pos) However, the scale parameter does not seem to have any