From 105791e35cee694f3b2ac1e06758650fe44e2c71 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 24 Feb 2015 11:38:59 -0800
Subject: [PATCH] [MLLIB] Change x_i to y_i in Variance's user guide
Variance is calculated on labels/responses.
Author: Xiangrui Meng <meng@databricks.com>
Closes #4740 from mengxr/patch-1 and squashes the following commits:
673317b [Xiangrui Meng] [MLLIB] Change x_i to y_i in Variance's user guide
---
docs/mllib-decision-tree.md | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/docs/mllib-decision-tree.md b/docs/mllib-decision-tree.md
index d1537def85..6675133a81 100644
--- a/docs/mllib-decision-tree.md
+++ b/docs/mllib-decision-tree.md
@@ -54,8 +54,8 @@ impurity measure for regression (variance).
<tr>
<td>Variance</td>
<td>Regression</td>
- <td>$\frac{1}{N} \sum_{i=1}^{N} (x_i - \mu)^2$</td><td>$y_i$ is label for an instance,
- $N$ is the number of instances and $\mu$ is the mean given by $\frac{1}{N} \sum_{i=1}^N x_i$.</td>
+ <td>$\frac{1}{N} \sum_{i=1}^{N} (y_i - \mu)^2$</td><td>$y_i$ is label for an instance,
+ $N$ is the number of instances and $\mu$ is the mean given by $\frac{1}{N} \sum_{i=1}^N y_i$.</td>
</tr>
</tbody>
</table>
--
GitLab