SumSquaredErrors Command

From GeoGebra Manual
Revision as of 10:24, 12 October 2017 by Mathmum (talk | contribs) (command syntax: changed [ ] into ( ))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

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).
© 2020 International GeoGebra Institute