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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Tipos de Sistemas do Aprendizado de Máquina | 13
É uma boa ideia tentar reduzir a dimensão dos dados de treinamento
com a utilização de um algoritmo de redução de dimensionalidade antes
de fornecê-lo a outro algoritmo do Aprendizado de Máquina (como um
algoritmo de aprendizado supervisionado). Este algoritmo será executa-
do muito mais rapidamente, os dados ocuparão menos espaço em disco
e na memória e, em alguns casos, podem rodar melhor também.
Outra importante tarefa não supervisionada é a detecção de anomalias — por exemplo,
a detecção de transações incomuns em cartões de crédito para evitar fraudes, detectar
defeitos de fabricação ou r
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