0
2
4
6
8
10
0
0.05
0.1
0.15
0.2
0.25
How.comfortable.are.you.with.R.
How.familiar.are.you.with.the.R.package.ggplot2.
How.familiar.are.you.with.the.R.package.plotly.
How.familiar.are.you.with.web.technologies.
value
density