Problem 486. Surface Fit z(x,y)
Given three vectors x,y,z. Find four coefficients c = [cxx cxy cyy c00], such that z = cxx*x.^2+cxy*x.*y+cyy*y.^2+c00.
For example,
x = [ 0 0 1 1 2 2 3 3] y = [ 0 1 0 1 0 1 0 1] z = [-4 -1 -3 -2 0 -1 5 2]
then
z = x.^2-2*x.*y+3*y.^2-4
and
c = [cxx cxy cyy c00] = [1 -2 3 -4]
Solution Stats
Problem Comments
-
2 Comments
Tim
on 12 Mar 2012
The test suite does not allow for roundoff error.
AMITAVA BISWAS
on 12 Mar 2012
good point, fixed, thanks
Solution Comments
Show commentsProblem Recent Solvers44
Suggested Problems
-
4353 Solvers
-
Project Euler: Problem 9, Pythagorean numbers
1082 Solvers
-
253 Solvers
-
Who is the smartest MATLAB programmer?
737 Solvers
-
Fahrenheit to Celsius converter
537 Solvers
More from this Author100
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!