Difference between revisions of "SigmaXY Command"
From GeoGebra Manual
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{{command|statistics}} | {{command|statistics}} | ||
; SigmaXY[List of x-Coordinates, List of y-Coordinates]: Calculates the sum of the products of the ''x''- and ''y''-coordinates. | ; SigmaXY[List of x-Coordinates, List of y-Coordinates]: Calculates the sum of the products of the ''x''- and ''y''-coordinates. | ||
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; SigmaXY[List of Points]: Calculates the sum of the products of the ''x''- and ''y''-coordinates. | ; SigmaXY[List of Points]: Calculates the sum of the products of the ''x''- and ''y''-coordinates. | ||
| − | : Example | + | :{{Example| You can work out the covariance of a list of points using <tt>SigmaXY[list]/Length[list] - MeanX[list] * MeanY[list]</tt>.}} |
Revision as of 11:58, 14 February 2011
- SigmaXY[List of x-Coordinates, List of y-Coordinates]
- Calculates the sum of the products of the x- and y-coordinates.
- SigmaXY[List of Points]
- Calculates the sum of the products of the x- and y-coordinates.
- Example: You can work out the covariance of a list of points using SigmaXY[list]/Length[list] - MeanX[list] * MeanY[list].
