# 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: In order to work out the variance of a list you may use <tt>SigmaXX[list]/Length[list] - Mean[list]^2</tt>. | : Example: In order to work out the variance of a list you may use <tt>SigmaXX[list]/Length[list] - Mean[list]^2</tt>. | ||

; 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 03:38, 6 November 2010

- 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.