```
function X = order_dict(W)
% X = order_dict(W)
% W is a dictionary of NMF columns.
% Return X as an ordering of them that tries to sort
% by fundamental frequency, so that imagesc(W(:,X))
% looks well structured.
% 2013-04-29 Dan Ellis dpwe@ee.columbia.edu
% Right now, just assume that largest bin corresponds to fundamental
[vv, xx] = max(W); % xx holds largest row in each column
[vvv, X] = sort(xx); % X orders columns of W by index of largest bin
```