Transparency is a nice feature to make your visualizations look better and it also allows you to show data more clearly (pun not intended, but appreciated after the fact). It means that your data will not obscure other data as you view it.
By
Doug Hull
Doug first used MATLAB in 1994, could not figure it out until he got some help in 1995. He is now dedicated to making sure that no one else wastes a year of their life not knowing MATLAB like he did.
Alpha can make plots much easier to view however I’ve noticed that the alpha map doesn’t scale with the data map when using the magnifying glass.