Gnuplot has plenty of examples on its histograms demo page. The demos use immigration.dat as a datasource, which you can find in gnuplot’s GitHub repository: immigration.dat data source.
While the examples demonstrate many of the available features, it’s not clear what some of the specific options do. You could read the documentation, but who has time for that? Some of us are just trying to create really simple histograms and don’t need to master the nuances of gnuplot.
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