# SumSquaredErrors Command

From GeoGebra Manual

Revision as of 13:58, 16 July 2013 by MagdalenaSophieF (talk | contribs)

- SSumSquaredErrors[ <List of Points>, <Function> ]
- Calculates the sum of squared errors, SSE, between the y-values of the points in the list and the function values of the x-values in the list.
**Example:**If we have a list of points: L={A,B,C,D,E} and have calculated for example:`f(x)=FitPoly[L,1]`

and`g(x)=FitPoly[L,2]`

, then it is possible to decide which of the two functions offers the best fit, in the sense of the least sum of squared errors (Gauss), by comparing:`sse_f=SumSquaredErrors[L,f]`

and`sse_g=SumSquaredErrors[L,g]`

.