example/__alt_exec_modes/run.set_num_ref_groups.R

In broadinstitute/inferCNV: Infer Copy Number Variation from Single-Cell RNA-Seq Data

#!/usr/bin/env Rscript

library("infercnv")

# create the infercnv object
infercnv_obj = CreateInfercnvObject(raw_counts_matrix="../oligodendroglioma_expression_downsampled.counts.matrix",
                                    annotations_file="../oligodendroglioma_annotations_downsampled.txt",
                                    delim="\t",
                                    gene_order_file="../gencode_downsampled.txt",
                                    ref_group_names=c("Microglia/Macrophage","Oligodendrocytes (non-malignant)"))


out_dir="output_dir_ref_grps_4"

# perform infercnv operations to reveal cnv signal
infercnv_obj = infercnv::run(infercnv_obj,
                             cutoff=1, 
                             out_dir=out_dir,
                             cluster_by_groups=T, 
                             plot_steps=T,
                             num_ref_groups=4,
                             )

# generate final plot
plot_cnv(infercnv_obj,
         out_dir=out_dir, 
         cluster_by_groups=T,
         color_safe_pal=FALSE,
         x.center=1,
         x.range=c(0.6,1.4),
         title="inferCNV",
         obs_title="Observations (Cells)",
         ref_title="References (Cells)",
         output_filename="infercnv")