ekoam questions

ekoam answers

• fread: empty string ("") in na.strings is not interpreted as NA
• How to perform conditional mutate on unspecified columns (e.g. matching regex)?
• Calculate number of observations in each node in a decision tree in R?
• How to create combinations of values of one variable by group using tidyverse in R
• (tidyverse approach) calculating rowsum across several columns where info on columns to include comes from a different data frame
• How to group rows in a range and consider a 3rd column?
• Extract data frames from nested list
• R: Detect a "main" Path and remove or filter the GPS trace maybe using a kernel?
• Is it possible to create a self-rendering Rmarkdown document?
• ggmap in R - keep google copyright information on cropped map