ggplot2, by Hadley Wickham, is an excellent and flexible package for elegant data visualization in R. However the default generated plots require some formatting before we can send them for ...

Knowing how to swim is a valuable skill that can improve your health and fitness, and even help save your life. To make sure that New Yorkers stay safe in and near the water, we’re offering free ...

All levels will incorporate skills and concepts to stay safe around water, in addition to those needed to help themselves or others in an aquatic emergency. Beginner - Introduces basic aquatic skills ...