Description

Syntax

double regr_sxx(y, x)

x, y support basic numeric types.

calculate the sum of the squared differences between each X value and the mean of all X values

EXAMPLE

We have the following data

mysql> select * from t;
+------+------+------+
| id   | x    | y    |
+------+------+------+
|    2 |   14 |   27 |
|    4 |   10 |   20 |
|    3 |    5 |    7 |
|    1 |   18 |   13 |
+------+------+------+

mysql> select regr_sxx(y,x) from t;
+----------------+
| regr_sxx(y, x) |
+----------------+
|          92.75 |
+----------------+

KEYWORDS

REGR_SXX