I have a graph, and I have an image. I would like to have it such that specific actors are on specific points on the image. I really have no idea where to start?
Hi Sam, Check out the following tutorial from Wolfram
http://reference.wolfram.com/language/example/BuildFoodWebs.html
I had seen that tutorial, but I am sort of trying to do the opposite of that. I want to overlay the graph onto the image, specifying certain ponts on the image to be certain actors in the graph.
You can get two superposed graphs or images using the construction:
Graphics[{Inset[picture1,{x1,y1}],Inset[picture2,{x2,y2}]}]
then adjusting the xs and ys to move the pictures into the desired positions.
If you’re using Graph, then supply the VertexCoordinates → {} to specify the coordinates of the vertices. Note that these must be supplied in the order of the vertex nodes, I think.
points = {{1, 2}, {2, -1}, {3, 1}}
Graph[{1 \[UndirectedEdge] 2, 2 \[UndirectedEdge] 3, 3 \[UndirectedEdge] 1},VertexLabels -> "Name"]
Graph[{1 \[UndirectedEdge] 2, 2 \[UndirectedEdge] 3, 3 \[UndirectedEdge] 1}, VertexLabels -> "Name", VertexCoordinates -> points, Axes -> True]
To place the graph over an image, you can use Overlay. Or you can have fun with the Prolog option in Graph:
points = {{100, 180}, {150, 150}, {170, 100}};
g = Graph[{1 \[UndirectedEdge] 2, 2 \[UndirectedEdge] 3,
3 \[UndirectedEdge] 1}, VertexLabels -> "Name",
VertexCoordinates -> points,
EdgeStyle -> Directive[{AbsoluteThickness[5], Cyan}],
VertexStyle -> Red, VertexSize -> Tiny,
Prolog -> {Raster[
ImageData[
Darker[ImageResize[
ExampleData[{"TestImage", "Mandrill"}], {200}], .5],
DataReversed -> True]]}, PlotRange -> {{0, 200}, {0, 200}}
]
