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Apr 24th, 2018
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  1. from operator import itemgetter
  2. from itertools import islice
  3.  
  4. # rango de las D columnas de Y más relevantes (mayor varianza)
  5. dia = enumerate(np.diag(Y))
  6. srt = sorted(dia, key=itemgetter(1), reverse=True)
  7. idx = islice(map(itemgetter(0), srt), D)
  8. rng = sorted(idx)
  9.  
  10. # después
  11. Y[:,rng]
  12. V[:,rng]
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