Matlab: Undefined function 'graph' for input arguments of type 'cell'

Question

I am using MATLAB R2013b. I don't understand why the following code is giving error-

    a=[1 1 1 2 2 3 3 4 4 5 7];
    b=[2 3 4 3 7 4 6 5 7 6 8];
    names={'A','B','C','D','E','F','G','H'};
    G=graph(a,b,[],names)

Error:Undefined function 'graph' for input arguments of type 'cell'.

Answer 1

The documentation for graph:

https://www.mathworks.com/help/matlab/ref/graph.html

States that graph was introduced in R2015b. The problem is that your version of MATLAB does not contain the graph function.