Interpolation Using griddata in 2D and 3D Spaces in MATLAB

Instructor: Mostapha Kalami Heris

00:00 Perform 2D and 3D interpolation using griddata
00:50 Interpolation methods
1:19 Triangulation-based cubic interpolation

[gowthamsubramanyam]

How to find the x-intercept (x value at Y=0) in a graph where there are many elliptical/rectangular this interpolation function useful???

[TheLivirus]

A surface can be defined as either *x(y, z), y(x, z)* or *z(x, z)* depending on which variable is *inquired.* Unfortunately, it seems the *griddata()* and *scatteredInterpolant()* functions of MATLAB do *not* always *return consistent results* for a given set of points (x, y, z) when *switching the inquired variable.* In other words, x(y0, z0), y(x0, z0) and z(y0, z0) does not refer to the same point. The problem seem to relate to the tessellation of the points, which result in different interpolation surfaces depending on which is the inquired variable. Any advice on how to counter this issue?

[marceloandresacuna]

Excellent very helpful!. How can I get a value of a mesh v(x, y)? I don't have a f@(x, y). I have only a points, V, as a matrix.

[davidajirotutu]

Thanks for the Video. Please, I used MATLAB to solve PDE eigenfunctions ("solvepdeeig & plotpdeeig") in PDE Toolbox . Its a 3D model problem with the eigenvectors results in 3D matrix. Now, I am trying get a 2D plot at the mid plane of my 3D plot to access some information. Please, can you lead me on this.