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+--- Thread: (50g) Quadratic Regression (/thread-3159.html)
(50g) Quadratic Regression - Eddie W. Shore - 02-21-2015 02:33 PM
The program QUADRES finds a quadratic fit using the matrix ∑DAT. The result is a column vector:
[[ c ]
[ b ]
[ a ]]
from y=a*x^2 + b*x + c
Program:
Code:
<< ∑DAT 1 COL- VANDERMONDE DUP SIZE OBJ→ DROP DROP 3 2 →LIST {1,1}
SWAP SUB LSQ >>Example:
∑DAT:
[[ 2 .23 ]
[ 3 .58 ]
[ 4 .96 ]
[ 8 1.85]
[16 3.66]]
Results:
[[ -.302930140195 ]
[ .304114954514 ]
[ -3.5562830888E-3 ]]