barplotfunction has a number of optional parameters. It might be interesting to play with a dataset and the parameters.
When you are displaying a word cloud, the function might complain that some words might not fit. Determine whether there is a way that this can be overcome.
When, how, and why?
What is the best way to determine the number of bins to be used in the
It was very unclear when producing a stacked bar chart as to how to organize the data to arrive at the correct result. Select a dataset and produce a stacked chart that meets your needs.
There are several packages to produce plots. How would you select one of the packages to use for your plotting needs?
If there was a package that extracted just the text from a web page, that would be of tremendous use for R programming. Investigate whether anyone has made such a package or at least taken the initial steps.