Update README.md

README.md

@@ -173,9 +173,10 @@ CALDER(contact_file_hic=hic_file,
 
 ### Example four: run CALDER on other genomes
 ```
+## prepare feature_track
 library(rtracklayer)
-feature_track  = import('ENCFF934YOE.bigWig') ## from ENCODE
-feature_track = data.table::as.data.table(feature_track)[, c(1:3, 6)]
+feature_track_raw  = import('ENCFF934YOE.bigWig') ## from ENCODE https://www.encodeproject.org/files/ENCFF934YOE/@@download/ENCFF934YOE.bigWig
+feature_track = data.table::as.data.table(feature_track_raw)[, c(1:3, 6)]
 
 chrs = c(21:22)
 contact_file_dump = as.list(system.file("extdata", sprintf("mat_chr%s_10kb_ob.txt.gz", chrs),