FAQ

My SpatialExperiment contains ENSEMBL IDs. Can i still perform deconvolution?

It is possible to perform second-generation deconvolution algorithms when annotated scRNA-seq data containing ENSEMBL IDs is available. All first-gen deconvolution tools require HGNC symbols. You may also check your SpatialExperiment rowData() for available annotation to overwrite ENSEMBL IDs. In most cases this can be solved by using the following code:

rownames(spe) <- rowData(spe)$symbol

How can i see which deconvolution results are available in my object?

You can use available_results(object) or access names(colData(object)) to see which deconvolution results are available.

The spacedeconv plots contain a lot of white spots

When reading raw spatial data the SpatialExperiment contains expression information for all spots, even if they are not located over tissue. Remove those spots with the following code

spe <- spe[, colData(spe)$in_tissue == TRUE]

The Visium Slide and the spatial data are not rotated in the same direction

The SpatialExperiment wrapper includes function to rotate/mirror the image. More information can be found in the Visualization Vignette or the SpatialExperiment Documentation.

The hexagons in my plots are rotated and don’t give an even appearance

Your Visium slide might be aligned incorrectly. Try rotating the image or use offset_rotation=TRUE as a parameter in the plotting function.

Which deconvolution tools are available?

This list includes the methods name and the internally used tokens. More detailed descriptions of each method can be found at the end of this vignette.

spacedeconv::deconvolution_methods

## → checking spacedeconv environment and dependencies