#这一步报错 group_colors <- cell_pal(sce_slingshot2$orig.ident, brewer_pal("qual", "Set2")) Error in brewer_pal("qual", "Set2") : could not find function "brewer_pal" 解决办法:cell_colors <- cell_pal(subset_rnaslot$cell.type, hue_pal())#, brewer_pal("qual", "Set2") ...