3d surface plot by having 3 uncorrelated vectors

Hi everyone,

I'm trying to plot a 3D surface in Matlab, having three different vectors x,y,z. All the three have dimension 1601x1 and they are not correlated by any mathematical formula, they are only coordinates of some points that have to be plotted. I would like to plot a 3d homogeneous surface (not point by point) with different colours indicating the different heights (maybe yellow where z is higher and blue where z is lower). I don't want a discrete surface (actually I've already tried to use plot3 but it seems to be a point surface or a line one, I want an homogenous thing).

Could you help me please?

Thank you in advance,

Gianmarco

[Walter Roberson]

In order to describe a surface, you need information about which points are connected to which, so that you can create faces. You currently have a list of points, but how to decide which points are connected to which ones?

[Gianmarco Azzolin]

These points are part of a circular membrane, their coordinates are extrapolated by the numerical model on Patran software and follow a counter-clock path starting from the x axis. I attach the screen of the numerical model and its nodes. The fact is that when this membrane is deformed, by using FBG and modal analysis I retrieve the displacements in all points, storing them in three different vectors x,y,z. I would like to have a visual image of the deformed membrane, knowing the displacements of the nodes which it is composed by.

[KSSV]

Attach your data.

Answer 1

[KSSV]

Let (x,y,z) be your three column arrays.

dt = delaunayTriangulation(x,y) ;
tri = dt.ConnectivityList ;
figure
trisurf(tri,x,y,z)