Difference between revisions of "SumSquaredErrors Command"
From GeoGebra Manual
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;SumSquaredErrors[ <List of Points>, <Function> ] | ;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. | :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|1= If we have a list of points: L={A,B,C,D,E} and have calculated for example: f(x)= | + | {{example|1= If we have a list of points: L={A,B,C,D,E} and have calculated for example: <code>f(x)=FitPoly[L,1]</code> and <code>g(x)=FitPoly[L,2]</code>, 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: <code>sse_f=SumSquaredErrors[L,f]</code> and <code>sse_g=SumSquaredErrors[L,g]</code>.}} |
Revision as of 18:01, 9 March 2012
- 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={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]
.