Statistical analysis of biomedical data – white or black magic?

R is a free software environment for statistical analysis and visualization. One of the R’s greatest charms is ggplot2 library. How does this library work? Can graphs be used to manipulate the reader? How difficult is it to create an effective and efficient graph? In this lecture, the audience will learn about the principles of ggplot2 library and find out whether they truly understand the meaning of arithmetic mean, standard deviation, or percentages. The lecture is in Czech.