Directed Graph with Node IDs as String

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Hi. I am new to graphs in Matlab and started learning it by programming directly. So I have this situation in which one node will be connected to Multiple nodes in a directed graph. I was able to achieve this by using 'digraph' in Matlab. However, the problem comes when I use Node IDs which are string. I am able to achieve it in a single line of code for numerical Node IDs but not for String Node IDs. That is:
G = digraph([1 1] , [2 3]);
plot(G)
I am able to get a directed Graph with three nodes 1, 2 and 3 and the edges being from 1 to 2 and 1 to 3.
When I perform the following code, I get the same result
G = digraph(1 , [2 3]);
plot(G)
However, if i change the numbers to string, I am unable to get a similar result. This is the code I wrote
G = digraph(['v1'] , ['v2' 'v3']);
plot(G)
It gives me only two nodes: v1 and v2v3 and only one edge from v1 to v2v3. But I want is as three nodes and 2 edges:
v1 to v2
v1 to v3
PS: A comma between v2 and v3 did not help.
Please note that I had to write multiple line of code to achieve this but I would like to know if there is a way to put the code in a single line.
G = digraph('v1' , 'v2');
G = addedge(G, 'v1' , 'v3');
plot(G)
This gives me the desired result. But I would like to know if there is a way to do it in a single line.

Accepted Answer

Steven Lord
Steven Lord on 9 Nov 2016
When you write the command ['v2' 'v3'] the result is 'v2v3', a 1-by-4 char array. The two char arrays are concatenated together into one larger char array. Instead, use a cell array containing char arrays.
>> G = digraph({'v1'} , {'v2' 'v3'});
  1 Comment
Arun Subramanian
Arun Subramanian on 10 Nov 2016
Thanks a lot. It did the trick for me.

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More Answers (1)

Eng. Fredius Magige
Eng. Fredius Magige on 9 Nov 2016
Hi Gplot with adjacency matrix is good option for multidirective graph, Thanks

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