Layering multiple images in 3D-space

Question

Suppose we have a matrix I of size 49x49x5, corresponding to 5 images of size 49x49 stacked along the third dimension so we have a total of 5 images. These images should vis

Answer 1

The function you're looking for is the patch function. By way of example:

x=[1 1 6]; y=[2 7 2]; z=[1 1 -1];

This specifies a triangle (three points), and the coordinates of the vertices are (1,2,1), (1,6,1), and (6,2,-1). If you would add a fourth point to each vector it would be a rectangle, with the new vertex at the new x,y,z coordinate.

To answer your posted question directly, you can plot a number of rectangles for each variable simply by using a multidimensional array for x, y, and z, where each column specifies a different polygon. In practice, this works as follows:

% plot two rectangles
x = [1 1 1 1;
    1 1 1 1;
    4 4 4 4;
    4 4 4 4;];

y = [1 1 1 1;
    2 2 2 2;
    2 2 2 2;
    1 1 1 1;];

z = [1 2 3 4;
    1 2 3 4;
    1 2 3 4;
    1 2 3 4;];

patch(x,y,z,'w');

Which makes:

There are options you can use to add color to the polygons, check the docs.