Create a table with values from ecdf graph

Question

I am trying to create a table using values from an ecdf plot. I\'ve recreated an example below.

#Data
data(mtcars)

#Sort by mpg
mtcars <- mtcars[order(mtcars$mpg),]         


        

Answer 1

A much shorter answer that I can't believe I didn't see earlier. Essentially I just divide the number of rows equal to or less than .25, .5, and .75 by the total number of rows, for each cyl.

cyl.table<-mtcars %>%
  group_by(cyl) %>%
    summarise("25% Picked" = sum(Percent_Picked<=0.25)/(sum(Percent_Picked<=1)),
              "50% Picked" = sum(Percent_Picked<=0.5)/(sum(Percent_Picked<=1)),
              "75% Picked" = sum(Percent_Picked<=0.75)/(sum(Percent_Picked<=1)))
cyl.table