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 Solvers45
Suggested Problems
-
Project Euler: Problem 1, Multiples of 3 and 5
3100 Solvers
-
Find the maximum number of decimal places in a set of numbers
2732 Solvers
-
Convert from Base 10 to base 5
257 Solvers
-
8195 Solvers
-
509 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!