Version 7.0.0 of drake just arrived on CRAN, and it is faster and easier to use than previous releases.install.packages("drake")Recap Data analysis can be slow. A round of scientific computation can take several minutes, hours, or even days to complete. After it finishes, if you update your code or data, your hard-earned results may no longer be valid. How much of that valuable output can you keep, and how much do you need to update?