10 lines
672 B
Matlab
10 lines
672 B
Matlab
function G = configuration_goodness(rbm_w, visible_state, hidden_state)
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% <rbm_w> is a matrix of size <number of hidden units> by <number of visible units>
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% <visible_state> is a binary matrix of size <number of visible units> by <number of configurations that we're handling in parallel>.
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% <hidden_state> is a binary matrix of size <number of hidden units> by <number of configurations that we're handling in parallel>.
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% This returns a scalar: the mean over cases of the goodness (negative energy) of the described configurations.
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cases = size( visible_state, 2 );
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sisj_wij = rbm_w .* (hidden_state * visible_state');
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G = sum( sum( sisj_wij )) / cases;
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end
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