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linefit()
Description:
Perform linear fitting using the least squares method.
Syntax:
linefit(A,Y)
Note:
A least squares fitting technique is to get the nearest possible value of constant sequence/ vector Y by multiplying matrix A by vector X, that is, the nearest result of AX=Y. The function performs a linear fitting using the least squares method to get vector X. The function returns a matrix when parameter Y is a matrix and a vector when Y is a vector.
Parameter:
|
A |
A matrix or a vector |
|
Y |
A matrix or a vector |
Return value:
Sequence
Example:
|
|
A |
|
|
1 |
[[1,2,3,4],[2,3,1,2],[1,1,1,-1],[1,0,-2,-6]] |
|
|
2 |
[[2,2],[3,5,1],[8],[4]] |
|
|
3 |
=linefit(A1,A2) |
Fit A1 and A2 together using the least squares fitting technique and return the fitting coefficient. |
|
4 |
[4,6,-2,4] |
|
|
5 |
=linefit(A1,A4) |
Fit A1 and A4 together using the least squares fitting technique and return the fitting coefficient. |
