There are many ways to make plots. Here is a simple example. If you provide more details about your data and goals, someone may be able to give more specific guidance.
DF <- data.frame(Name = c("A", "B", "C"), Value = c(5,3,7))
barplot(Value ~ Name, data = DF )

Created on 2020-10-26 by the reprex package (v0.3.0)