```r DimPlot(dim_example, group_by = "clusters", velocity = c("stochasticbasis_1", "stochasticbasis_2"), pt_alpha = 0) ``` ``` Error in vapply(glyph, get_attr, which = "width", default = 0, numeric(1)) : values must be length 1, but FUN(X[[1]]) result is length 200 ```