Joschi questions

• Overlay Polygons in ggplot2 and make the overlay transparent
• Handle ASCII in R
• Call a specific column name in R
• Having trouble to use the plyr package and working with lists
• Externalization of code- layout in ggplot
• Load and save single objects to workspaces in R/R-Studio
• Use object names as list names in R
• Hierarchical Clustering: Determine optimal number of cluster and statistically describe Clusters
• R: Apply function on specific columns preserving the rest of the dataframe
• cut function in R- labeling without scientific notations for use in ggplot2

Joschi answers