tutorial for the or snipet for case where we only have 1 modality

[M0hammadL]

The way to enocde the data and dataloader for single-modality datasets is not clear

[Nusob888]

Hi all, great tool! Just checking if any update on this?

I have tried a few variations to input only scRNAseq data by itself with no other modes, but the model seems to fail to fully train.

I am doing the following:

`
adata = mtm.data.organize_multimodal_anndatas(
adatas=[[adata_ref]], # a list of anndata objects per modality, RNA-seq always goes first
layers=[["counts"]], # if need to use data from .layers, if None use .X
)

adata_indices_end = adata.shape[1]

mtm.model.MultiVAE.setup_anndata(
adata,
categorical_covariate_keys=["batch"],
rna_indices_end= adata_indices_end,
)

vae = mtm.model.MultiVAE(
adata,
losses=["nb"],
)

vae.train()
`

I get the following error:
Expected parameter loc (Tensor of shape (256, 16)) of distribution Normal(loc: torch.Size([256, 16]), scale: torch.Size([256, 16])) to satisfy the constraint Real(), but found invalid values:
tensor([[nan, nan, nan, ..., nan, nan, nan],
[nan, nan, nan, ..., nan, nan, nan],
[nan, nan, nan, ..., nan, nan, nan],
...,
[nan, nan, nan, ..., nan, nan, nan],
[nan, nan, nan, ..., nan, nan, nan],
[nan, nan, nan, ..., nan, nan, nan]], device='cuda:0',
grad_fn=)

Which I presume has something to do with my single modality approach, as I can train the same dataset using scVI, MultiVI and scPoli fine (with the same hvg selections and preprocessing).

Any help would be much appreciated.