MATLAB trisurf
The trisurf function creates a 3D graphic.
Contents
Usage
The trisurf function creates a 3D graph based on a triangulation. Such a matrix can be created by convhull, like:
% Create a rectangular grid. [X,Y,Z] = meshgrid(linspace(-3,3,20), linspace(-3,3,20), linspace(-3,3,20)); % Identify the points within a region of integration. roi = (X>=0 & X<=sqrt(4-Z.^2-Y.^2)) & (Y>=0 & Y<=sqrt(4-Z.^2) & (Z>=0 & Z<=1)); % Calculate the convex hull of this ROI and plot. K = convhull(X(roi), Y(roi), Z(roi)); figure; trisurf(K, X(roi), Y(roi), Z(roi));
See also figures and related commands.
Alternatively, see this example using delaunay:
% Create a grid. [X,Y] = meshgrid(1:15,1:15); % Evaluate the peaks function on a 15x15 grid. Z = peaks(15); % Triangulate and plot. T = delaunay(X,Y); figure; trisurf(T, X,Y,Z);