CubicalComplex documentation could be more inviting for higher dimensionsal data

[Matthlas]

Hi Bastian,

As I wrote in my E-mail to you I was a little confused and deterred by the documentation of the CubicalComplex class. I expected that your implementation only works for 2D images and was worried that, when feeding a 3D volume the third dimension would simply be considered channel information. I think especially the explicit example in the forward() method threw me off there:

        1. Tensor of `dim = 2`: a single 2D image
        2. Tensor of `dim = 3`: a single 2D image with channels
        3. Tensor of `dim = 4`: a batch of 2D images with channels

Now after having spend a little time reading the code and documentation again I can see that you were correctly describing the behavior of the method and there was a misunderstanding on my side. Still, I think the docs could be more inviting for higher dimensional data.

One way I thought of to improve the docs is to add an example for higher D data, or mention the usage of volumes etc in the docs.

Another way could be to slightly restructure the code and to simply set the default value of dim not to dim=None but dim=2, which would in my eyes result in the same behavior and to explain the behavior of treating "extra dimensions" of the data as channels/batch in a more general way with a specific example perhaps for 2D.

Thanks again for your help with our Project and your awesome work in the TDA field!

[Pseudomanifold]

Thanks for raising this issue! Just updated the documentation—please check again and let me know what you think.

[Matthlas]

Looks good to me :) Thanks for the effort!

[Pseudomanifold]

You are very welcome!