Sampling

Descrição

Bsc Hons Data Mining Mapa Mental sobre Sampling, criado por Steve Hiscock em 15-12-2013.
Steve Hiscock
Mapa Mental por Steve Hiscock, atualizado more than 1 year ago
Steve Hiscock
Criado por Steve Hiscock aproximadamente 12 anos atrás
18
0

Resumo de Recurso

Sampling
  1. Simple Random Sample
    1. Seed number. The chance of selection is equal
      1. Elements selected independently
    2. Systematic
      1. Taking every nth observation
      2. Take the first n examples
        1. Stratified - Classifying the data, and taking random samples
          1. Unbalanced stratified
            1. Taking a random sample, from each class not proportional to the class sizes
          2. Overfitting
            1. Perfect fits to the data, when its like in reality unlike to be perfect

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