The figure was plotted online using the bioinformatics toolkit (BIT) from the National Genomics Data Center, part of the China National Center for Bioinformation [1]. The R script was implemented with ggplot2.
[1] "Database Resources of the National Genomics Data Center, China National Center for Bioinformation in 2022." Nucleic acids research vol. 50,D1 (2022): D27-D38. doi:10.1093/nar/gkab951

Draw a histogram for the given dataset

The input file format example:
discrete input
letter #header
a
c
e
b
b
c
--------------------
continuous input
letter #header
1.2
3
4.4
6
11
8
---------------------------------------------
The palettes are derived from package ggsci :
npg: Nature Publishing Group
aaas:  American Association for the Advancement of Science
nejm:  The New England Journal of Medicine
lancet:  Lancet Oncology
jama:  The Journal of the American Medical Association
jco: Journal of Clinical Oncology
ucscgb:  The UCSCGB palette is from the colors used by UCSC Genome Browser for representing chromosomes
d3:  The D3 palette is from the categorical colors used by D3.js (version 3.x and before).
locuszoom: The LocusZoom palette is based on the colors used by LocusZoom
igv: The IGV palette is from the colors used by Integrative Genomics Viewer for representing chromosomes
uchicago:  The UChicago palette is based on the colors used by the University of Chicago
startrek:  This palette is inspired by the (uniform) colors in Star Trek
tron:  This palette is inspired by the colors used in Tron Legacy
futurama:  This palette is inspired by the colors used in the TV show Futurama
rickandmorty:  This palette is inspired by the colors used in the TV show Rick and Morty
simpsons:  This palette is inspired by the colors used in the TV show The Simpsons