graphics package and
dotplot from the
lattice package will be used to obtain the dot charts.
example(dotplot); example(dotchart);in the console and hit the Return key.
dotchart(Severity_Counts,col=15:16,lcolor="black",pch=2:3,labels=names(Severity_Counts),main="Dot Plot for the Before and After Release Bug Frequency",cex=1.5)
Here, the option
col=15:16 is used to specify the choice of colors;
lcolor is used for the color of the lines on the dot chart which gives a good assessment of the relative positions of frequencies for the human eye. ...