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25 lines
518 B
Plaintext
Executable File
25 lines
518 B
Plaintext
Executable File
https://cran.r-project.org/web/packages/corrplot/vignettes/corrplot-intro.html
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https://rpubs.com/toleafar/210620
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https://www.r-bloggers.com/using-apply-sapply-lapply-in-r/
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1. (a)
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To test the quality of a regression fit use mean squared error.
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1 ₙ
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MSE = ─── ∑ (yᵢ - f̂(xᵢ))²
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n ⁱ⁼¹
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Ave(y₀ - f(x₀))²
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To test the quality of a model in the classification settings, use the error rate:
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1 ₙ
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E = ─── ∑ I(yᵢ ≠ ŷᵢ)
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n ⁱ⁼¹
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