# SumSquaredErrors Command

From GeoGebra Manual

- SumSquaredErrors( <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={(1, 2), (3, 5),(2, 2), (5, 2), (5, 5)}`

and have calculated for example:`f(x)=FitPoly(L,1)`

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

.`SumSquaredErrors(L,f)`

yields*9*and`SumSquaredErrors(L,g)`

yields*6.99*, and therefore we can see, that*g(x)*offers the best fit, in the sense of the least sum of squared errors (Gauss).