DataScience+ We publish R tutorials from scientists at academic and scientific institutions with a goal to give everyone in the world access to a free knowledge. Our tutorials cover different topics including statistics, data manipulation and visualization!
Author

Placidia

Placidia has over 20 years' experience working with R and S-Plus to develop methodologies and analyse data. She works as a statistical consultant in Ottawa, Canada. Her clients include government departments, researchers in medicine and psychology, and the private sector.