How to fit all genes (labels) in chromosome ideogram plot made by RCircos package?
To change the maximum number of genes in RCircos, we could modified the char.width according to this link.
The actual value in a RCircos session could be modified with get and reset methods for plot parameters.
params &lt;- RCircos.Get.Plot.Parameters() #$char.width
params$char.width &lt;- 100 #default 500
RCircos.Reset.Plot.Parameters(params)

#the maxLabels are updated accordingly
RCircos.Get.Gene.Name.Plot.Parameters()