Dear all,

I am using Gviz and I am aiming to upload either a bigwig, wig or bedGraph file ; and I am getting the following error

Please would you advise if there is a way to fix it please. Thank you

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dTrack2 <- DataTrack(range = bgFile, genome = "hg38", type = "l", 
+                      chromosome = "chr1", name = "bigwig")
Error in h(simpleError(msg, call)) : 
  error in evaluating the argument 'x' in selecting a method for function 'tolower': Unable to identify extension for file ''

*

Perhaps you were referencing your file incorrectly. The Gviz vignette uses practice data within the package, so it references it using the system.file() function, e.g. system.file("extdata/test.bam", package = "Gviz"). Your own data should be referenced directly, e.g. bgFile = "path/to/myfile.bg"