Error in visGroup if more than 26 Samples are used

[retogerber]

Hi Almut

If I run visGroup(sce_hvg, group = "Sample", dim_red = "UMAP") I get the following error:
Error: Insufficient values in manual scale. 27 needed but only 26 provided.

Running scater::plotUMAP(sce_hvg, colour_by = "Sample") (which I think is similar to visGroup) works fine.

Best, Reto

[almutlue]

Hi Reto,
thanks a lot for pointing this out.
In visGroup I provide a colour vector to overwrite the R standard colours. Unfortunately this vector has only 26 elements and this raises your error. You can solve this by running

visGroup(sce_hvg, group = "Sample", dim_red = "UMAP") + scale_fill_manual(values=col_vec)

with col_vec being a color vector with 27 entries.

But this is a good point and shouldn't happen. I will fix this in the package and let you know when it is done!

Best,
Almut