Difference between revisions of "SumSquaredErrors Command"
From GeoGebra Manual
m |
m |
||
Line 1: | Line 1: | ||
− | <noinclude>{{Manual Page|version=5.0}}</noinclude> | + | <noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|statistics}} |
− | {{command|statistics}} | ||
;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: <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>.}} | :{{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 11:34, 11 August 2015
- 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]
andg(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]
andsse_g=SumSquaredErrors[L,g]
.