Alex Coppock questions

• extend geom_smooth in a single direction
• nested ifelse() is the worst; what's the best? [duplicate]
• Table including explicit NAs in R > 3.4.0
• Command for "Set working directory to source file location"
• use dplyr's summarise_each to return one row per function?
• use %>% with replacement functions like colnames()<-

Alex Coppock answers