How to solve [FindTransferAnchors] invalid or not-yet-implemented 'Matrix' subsetting problem

[kimjh0107]

Hi, thank you for making a wonderful tools.
I have a question about the function " FindTransferAnchors( ) " used in the multimodal reference mapping tutorial.

I am trying to get map one of my data to the reference data I am using. I used SCTransform tutorial method to my reference data and now I am trying to map my query data, but I've got in a problem. Whenever I used FindTransferAnchors( ) function to make a anchors the error : 'Error in umi[residual.features, , drop = FALSE] : invalid or not-yet-implemented 'Matrix' subsetting' comes up. Is there any way to solve this problem?

What I found is that both of my reference and query data matrix format is in 'dgCMatrix'. When I looked at the tutorial data, the data matrix format was 'dfCMatrix'. Is this the reason that I cannot get into the next step right now?

• Right now I am using the latest version of Seurat.

[timoast]

Please open an issue and include the full code you're running, as well as the output of sessionInfo()