March 2019
Intermediate to advanced
576 pages
20h 51m
Portuguese (Portugal, Brazil)
Content preview from Mãos à Obra: Aprendizado de Máquina com Scikit-Learn e TensorFlow
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Capítulo 8
Redução da Dimensionalidade
Muitos problemas de Aprendizado de Máquina envolvem milhares ou mesmo milhões
de características para cada instância de treinamento. Como veremos, isso não só torna
o treinamento extremamente lento, mas também torna muito mais difícil encontrar uma
boa solução. Este problema muitas vezes é referido como a maldição da dimensionalidade.
Felizmente, é possível transformar um problema insolúvel em um problema tratável no
mundo real ao reduzir consideravelmente o número de características abordadas. Por
exemplo, considere as imagens do MNIST (introduzidas no Capítulo 3): os pixels nas
bordas da imagem são quase ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.