# Difference between revisions of "SigmaXX Command"

From GeoGebra Manual

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; SigmaXX[List of Numbers]: Calculates the sum of squares of the given numbers. | ; SigmaXX[List of Numbers]: Calculates the sum of squares of the given numbers. | ||

− | :{{Example|1=In order to work out the variance of a list you may use <code>SigmaXX[list]/Length[list] - Mean[list]^2</code>.}} | + | :{{Example|1=In order to work out the variance of a list you may use <code>SigmaXX[list] / Length[list] - Mean[list]^2</code>.}} |

; SigmaXX[List of Points]: Calculates the sum of squares of the ''x''-coordinates of the given points. | ; SigmaXX[List of Points]: Calculates the sum of squares of the ''x''-coordinates of the given points. |

## Revision as of 10:04, 16 August 2012

- SigmaXX[List of Numbers]
- Calculates the sum of squares of the given numbers.
**Example:**In order to work out the variance of a list you may use`SigmaXX[list] / Length[list] - Mean[list]^2`

.

- SigmaXX[List of Points]
- Calculates the sum of squares of the
*x*-coordinates of the given points.