check plot

[mblue9]

@stemangiola could you check if the plot after
sce_obj_gamma_delta |> plotUMAP()
is what we want or if we need to do anything else to it?

[stemangiola]

I think is good to go. We stress that thresholding is not a proper solution that would require a proper cluster selection. Supplementary material. (I have added this text to the workshop.

In the future we will always use proper datasets with DelayedArray