dplyr is Hadley Wickham's re-imagined plyr package (with underlying C++ secret .. Finally, summarise() lets you calculate summary statistics.
Calculating summary statistics by group using dplyr. LawrenceStats. Loading Unsubscribe from..
Using quickly calculating summary statistics with dplyr - - travelOtherwise you will get stuck every inch during programming. How can I add argument to mean function in that case? The apply family of functions in base R does the same job as plyr, but with a slightly different interface.
4.4 Summarizing Data Within Groups (Exploratory Data Analysis with asbjorn.info)
Using quickly calculating summary statistics with dplyr -- flying cheap
I strongly recommend beginners to begin with plyr or the apply functions, and not what I did initially, which was nested for loops and hard bracket indexing. What I would like to have is something like.. Here is the plyr one line variant using ddply :.. But wait, there's more! Du kommenterar med ditt Twitter-konto. I have found the function summaryBy in the doBy package to be the most convenient for this:.. Discuss the workings and policies of this site. Fortunately, the dplyr package has some syntactic sugar to make this code much more readable.
Using quickly calculating summary statistics with dplyr -- tri cheap
That's another nice approach to keep in mind. Here, we calculate mean and standard deviation of the values.