Calculate First Quartile of a dataset using data.frame() where row numbers have been removed in R

Question

mylist2<-list(as.numeric(c(1:20)),(c(1:20)**2),sqrt(c(1:20)))

iData<-data.frame(do.call(cbind,mylist2))

print(iData,row.names=FALSE)

quantile(iData$X1,iData$X2,iData$X3,c(0.25,0.25,0.25))

I want to display these column combined vectors its first quartile, but I am stuck on this

You could simplify the creation of mylist2. Try mylist3 <- list(1:20, (1:20)**2, sqrt(1:20)); all.equal(mylist2, mylist3). The only difference between the two is that mylist2[[1]] is of class numeric and mylist3[[1]] is of class integer. — Rui Barradas
– Rui Barradas, Commented Jun 30, 2018 at 6:24

Melissa Key · Accepted Answer · 2018-06-30 04:44:50Z

4

If you're trying to get the quantiles of each column separately, I would recommend using the dplyr package:

library(dplyr)
iData %>%  summarize_all( ~ quantile(.x, probs = 0.25))

or equivalently

summarize_all(iData, ~ quantile(.x, probs = 0.25))

A base method would use sapply:

sapply(iData, function(x) quantile(x, probs = 0.25))

answered Jun 30, 2018 at 4:44

Melissa Key

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