3d Surfaces
These are Apas Cloud services: they run on our servers for a signed-in member. The examples below are shown already made; sign in to edit and run your own.
surf Apas Cloud
Samples z = f(x, y) on the CPU into a filled, colormap-shaded 3D surface, rendered live in the browser via WebGL2 (works in any WebGL2-capable browser, unlike webgpu-shaders' surface3d()).
expr (string) -- an expression in x and y, e.g. "sin(sqrt(x^2+y^2))"xmin (number) -- xmax (number) -- ymin (number) -- ymax (number) -- nx (number) -- optional grid resolution along x, defaults to 40ny (number) -- optional grid resolution along y, defaults to 40colormap (string) -- optional: "viridis" (default), "jet", "parula", or "turbo"
mesh Apas Cloud
Same sampling as surf(), rendered as a colormap-colored wireframe only (no filled faces) -- matches MATLAB's own mesh().
expr (string) -- an expression in x and yxmin (number) -- xmax (number) -- ymin (number) -- ymax (number) -- nx (number) -- optional grid resolution along x, defaults to 40ny (number) -- optional grid resolution along y, defaults to 40colormap (string) -- optional: "viridis" (default), "jet", "parula", or "turbo"
surfc Apas Cloud
surf() plus a set of contour lines projected onto the floor of the plot (the z = z_min plane) -- matches MATLAB's own surfc().
expr (string) -- an expression in x and yxmin (number) -- xmax (number) -- ymin (number) -- ymax (number) -- nx (number) -- optional grid resolution along x, defaults to 40ny (number) -- optional grid resolution along y, defaults to 40colormap (string) -- optional: "viridis" (default), "jet", "parula", or "turbo"
contour3 Apas Cloud
Draws only the iso-lines of z = f(x, y) at numLevels evenly spaced heights, each drawn at its own height on the surface (not projected to the floor) -- matches MATLAB's own contour3().
expr (string) -- an expression in x and yxmin (number) -- xmax (number) -- ymin (number) -- ymax (number) -- numLevels (number) -- how many evenly spaced contour levels to drawnx (number) -- optional grid resolution along x, defaults to 40ny (number) -- optional grid resolution along y, defaults to 40