Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
en:cs:k-nn_multiple_imputation [2024/05/04 22:31] – [Unique missing value imputation] fraggle | en:cs:k-nn_multiple_imputation [2024/05/27 15:34] (Version actuelle) – [Unique missing value imputation] fraggle | ||
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$f$ will be called the prediction function in subsequent sections. | $f$ will be called the prediction function in subsequent sections. | ||
- | * For a given normed space vector on corpse $K$ $(E, \|~\|_{E})$ and $X \in E$, let' define the binary relation $\le_{X}$: | + | * For a given normed space vector on corpse $K$ $(E, \|~\|_{E})$ and $X \in E$, let' define the binary relation $\le_{X}$ |
- | $$\forall X_{1} \in E \land \forall X_{2} \in E, X_{1} \le_{X} X_{2} \iff \|X - X_{1}\|_{E} \le_{K} \|X - X_{2}\|_{E}$$ | + | $$\forall X_{1} \in E \land \forall X_{2} \in E, X_{1} \le_{X} X_{2} \iff \|X - X_{1}\|_{E} \le_{K} \|X - X_{2}\|_{E}$$ |
- | * For a given normed space vector on corpse $K$ $(E, \|~\|_{E})$ and $X \in E$, let' define the binary relation $=_{X}$: | + | * For a given normed space vector on corpse $K$ $(E, \|~\|_{E})$ and $X \in E$, let' define the binary relation $=_{X}$ |
- | $$\forall X_{1} \in E \land \forall X_{2} \in E, X_{1} =_{X} X_{2} \iff \|X - X_{1}\|_{E} =_{K} \|X - X_{2}\|_{E}$$ | + | $$\forall X_{1} \in E \land \forall X_{2} \in E, X_{1} =_{X} X_{2} \iff \|X - X_{1}\|_{E} =_{K} \|X - X_{2}\|_{E}$$ |
====== k-NN multiple imputation ====== | ====== k-NN multiple imputation ====== | ||
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Y^* = \frac{1}{k} \sum_{i=1}^{k} Y_{i} | Y^* = \frac{1}{k} \sum_{i=1}^{k} Y_{i} | ||
\] | \] | ||
+ | |||
+ | * Impute with the median: | ||
* Impute with random sampling: | * Impute with random sampling: |