arrows - w3toppers.com

Odd ghc error message, “My brain just exploded”?

Consider the GADT data S a where S :: Show a => S a and the execution of the code foo :: S a -> a -> String foo s x = case s of S -> show x In a dictionary-based Haskell implementation, one would expect that the value s is carrying a class … Read more

How to draw a nice arrow in ggplot2

Here are some reproducible examples (try running them) A Simple arrow (i.e. line segment): library(dplyr) library(ggplot2) # Create a scatter plot i <- ggplot(mtcars, aes(wt, mpg)) + geom_point() # Add arrow i + geom_segment(aes(x = 5, y = 30, xend = 3.5, yend = 25), arrow = arrow(length = unit(0.5, “cm”))) A Simple curved arrow … Read more