## Documentation |

A Hopfield network with five neurons is designed to have four stable equilibria. However, unavoidably, it has other undesired equilibria.

We would like to obtain a Hopfield network that has the four stable points defined by the two target (column) vectors in T.

T = [+1 +1 -1 +1; ... -1 +1 +1 -1; ... -1 -1 -1 +1; ... +1 +1 +1 +1; ... -1 -1 +1 +1];

The function NEWHOP creates Hopfield networks given the stable points T.

net = newhop(T);

Here we define 4 random starting points and simulate the Hopfield network for 50 steps.

Some initial conditions will lead to desired stable points. Others will lead to undesired stable points.

P = {rands(5,4)}; [Y,Pf,Af] = net({4 50},{},P); Y{end}

ans = 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1

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