mirror of
https://asciireactor.com/otho/cs-5821.git
synced 2024-11-21 21:25:07 +00:00
25 lines
518 B
Plaintext
25 lines
518 B
Plaintext
https://cran.r-project.org/web/packages/corrplot/vignettes/corrplot-intro.html
|
|
|
|
https://rpubs.com/toleafar/210620
|
|
|
|
https://www.r-bloggers.com/using-apply-sapply-lapply-in-r/
|
|
|
|
1. (a)
|
|
|
|
To test the quality of a regression fit use mean squared error.
|
|
|
|
1 ₙ
|
|
MSE = ─── ∑ (yᵢ - f̂(xᵢ))²
|
|
n ⁱ⁼¹
|
|
|
|
|
|
|
|
Ave(y₀ - f(x₀))²
|
|
|
|
|
|
To test the quality of a model in the classification settings, use the error rate:
|
|
|
|
1 ₙ
|
|
E = ─── ∑ I(yᵢ ≠ ŷᵢ)
|
|
n ⁱ⁼¹
|