How to rename a vertices of agraphs

Here is the code that I'm trying to rename graph nodes as a,b,c in output. But it shows error

a=[1 2 3];
b=[3 2 1];
g=graph(a,b);
p=plot(g);
c=[a b c];
p.NodeLabel=[c];

Answer 1

[KSSV]

a=[1 2 3];
b=[3 2 1];
g=graph(a,b);
p=plot(g);
L={'a' 'b' 'c'};
p.NodeLabel=L;

Answer 2

[Shanmugavelan S]

Thank you sir. Suppose if we have n nodes, how to rename . This code works fine if vertex set is small. How to rename for a graph with n nodes(say)1:n as {2,4,6,... 2n} like that

[Steven Lord]

B = bucky;
g = graph(B(1:20, 1:20));
h = plot(g);

figure
h2 = plot(g);
h2.NodeLabel = string(2:2:40); % or

figure
h3 = plot(g);
h3.NodeLabel = "a" + (1:20);