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--- correlation [2020/06/11 16:58] – [공분산] hkimscil
+++ correlation [2020/11/17 20:22] – hkimscil
@@ Line 2: / Line 2: @@
 <WRAP left>
 ^  상관관계 데이터  ^^^^
-| 사람  | X  | Y  |  <imgcaption cor_scatterplot|correlation scatterplot>{{r_eg.01.png|Figure 1}}</imgcaption>  |
+| 사람  | X  | Y  |  [{{r_eg.01.png|Figure 1. correlation scatterplot}}]  |
 | A  | 1  | 1  |  :::  |
 | B  | 1  | 3  |  :::  |
@@ Line 65: / Line 65: @@
 \begin{eqnarray*}
 \text{corr(x, y)} & = & \frac{\text{cov(x, y)}}{\text{sd(x)} \text{sd(y)}} \\
-& = & \frac{\text{cov(x, y)}}{\sqrt{\text{var(x)} \text{var(y)} } }
+& = & \frac{\text{cov(x, y)}}{\sqrt{\text{V(x)} \text{V(y)} } }
 \end{eqnarray*}