combCollect: "Collect" Recombination
In datadr: Divide and Recombine for Large, Complex Data

Description Usage Arguments Details Author(s) See Also Examples

"Collect" recombination - collect the results into a local list of key-value pairs

1	combCollect(...)

...

Additional list elements that will be added to the returned object

combCollect is passed to the argument combine in recombine

Ryan Hafen

divide, recombine, combDdo, combDdf, combMeanCoef, combRbind, combMean

# Create a distributed data frame using the iris data set
bySpecies <- divide(iris, by = "Species")

# Function to calculate the mean of the petal widths
meanPetal <- function(x) mean(x$Petal.Width)

# Combine the results using rbind
combined <- recombine(addTransform(bySpecies, meanPetal), combine = combCollect)
class(combined)
combined

# A more concise (and readable) way to do it
bySpecies %>%
  addTransform(meanPetal) %>%
  recombine(combCollect)