plyr - Using R: plyr to purrr, part 1 | R-bloggers akartoto

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llply function - RDocumentation

Ultimately, I am trying to achieve something similar to the following, but leveraging dplyr instead of plyr: mtcars$cyl, function(x) { quantile(x, probs = probs) })) The best dplyr equivalent I can come up with is something like this: group_by(cyl) %>%.

Using R: plyr to purrr, part 1 | R-bloggers

7 Plotting with plyr You can use plyr to plot data by throwing away the output with an underscore (_). This is a bit cleaner than a for loop since you don't have to subset the data manually.

plyr source: R/ldply.r - R Package Documentation

Introduction The base R system provides lapply() and related functions, and the package plyr provides alternatives that are worth considering. It will be assumed that readers are familiar with lapply() and are willing to spend a few moments reading the plyr documentation, to see why the illustration here will use the ldply() function. The test task will be extraction of latitude (and then both ...

dlply function - RDocumentation

Say I want to have the baseball data (from the plyr package) listed according to 'id' and 'year'. There is a difference between creating the list according to either: 1. mylist1 <- dlply(baseball, .(id, year), identity) and. 2. mylist2 <- dlply(baseball, .(id), dlply, .(year), identity)