How to check graph connected or not for given adjacency matrix of graph

How to check given undirected graph connected or not

Answer 1

[Matt J]

For example,

G = graph([1 1 4],[2 3 5],[1 1 1],6);

conncomp(G)

[chandra Naik]

In Matlab 2017, generating error

Undefined function or variable 'graph'.

Error in connected (line 1)

G = graph([1 1 4],[2 3 5],[1 1 1],6);

[Matt J]

Bizarre. It's been there since R2015b.