Issues with plotting neuromaps output and with higher resolution images

[Melissa1909]

Description of issue

Dear neuromaps developers, I have two questions regarding the functioning of the toolbox.

I have used nulls.moran(img1, atlas='mni152', density='3mm', n_perm=100, seed=1234, n_proc=15) to calculate a null distribution for the image attached. The output numpy array has the following dimensions: [60, 72, 60, 100] - what do the dimensions mean? How can I visualize the null distribution? Why are a lot of the values NaN?

Furthermore, I was not able to run the function with the same image with 2mm resolution since my computer has always crashed. Even when running it on powerful servers with 1 GB RAM, it didn't finish. How does the computational complexity scale with resolution? Do you think 2mm resolution should be doable, so is sth going wrong here or would I just need a more powerful system? Best, Melissa

MeanSZPVBM_z_3mm.nii.gz

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