Plotting Projections of a Rectangle with Angles

I have a 256x256 rectangle with all entries being zero.

So far I Have:

figure

R=Pb2_rect; (This file was provided from my professor)

imshow(Pb2_rect)

title('256x256 Projection')

colorbar

theta=0;

The image is

My task is to: Plot the projections of this rectangle for theta= 0, theta= 90 (see also function “radon” in matlab).

How do I do that?

[Matt J]

Well, did you look at the function radon as the exercise suggests?

https://www.mathworks.com/help/images/ref/radon.html

[Nasir Holliday]

I did look at that, but the radon function uses a range for theta, whereas in this exercise example I am only using one angle.

[Asvin Kumar]

The documentation says that theta can be of types numeric scalar, numeric vector or gpuArray. So, you should be able to give one angle as an input to the function.