Visualizing flow through graph networks

I've the following graph.

tail = 1:9;
head = 2:10;
G = graph(tail,head);
data  = 1:10;
G.Nodes.Value = data';
p = plot(G)
p.Marker = 's';
p.MarkerSize = 7;

From the examples shown here, I could understand how linewidths of edges can be adjusted based edge weights. However,

in my example I have values assigned to nodes. I would like to change the color of nodes based on values stored in data.

Any suggestion on how this can be done?

Answer 1

[Steven Lord]

Set the NodeCData property of the GraphPlot object.

p.NodeCData = G.Nodes.Value;

colorbar % to see the mapping between value and color

[Deepa Maheshvare]

Many thanks for the response. I'd like to know how to map all values to a gray scale.

For instance, while plotting line graph,

cmap = colormap(gray(10));

can be used to color the lines.

[Steven Lord]

The corresponding property for edges is EdgeCData.

When you display p, you can see a list of some of the properties of the GraphPlot that you can query or change. There's also a link you can click to see more properties.

If you want more information about the values each of those properties can take and what each property means, see this documentation page. If you're using an older release you probably want to reference the properties link on the documentation page for GraphPlot instead of the online documentation for the current release, since we have added properties to the GraphPlot object in some recent releases.

doc GraphPlot

[Deepa Maheshvare]

Thank you. I think I should be using caxis to set the scale of colorbar

When I try the following,

caxis([0 10])

The color of nodes vary from yellow to blue.

However, I would like to change the scale from gray to black. So, I tried changing the color of node

p.NodeColor = [0 0 0]; %black

I had expected the above would set the color scale to vary from gray to black. This didn't work either.

Any suggestions?