how to realize countifs function (excel) in R

Question

I have a dataset containing 100000 rows of data. I tried to do some countif operations in Excel, but it was prohibitively slow. So I am wondering if this kind o

Answer 1

Table is the obvious choice, but it returns an object of class table which takes a few annoying steps to transform back into a data.frame So, if you're OK using dplyr, you use the command tally:

    library(dplyr)
    df = data.frame(sex=sample(c("M", "F"), 100000, replace=T), occupation=sample(c('Analyst', 'Student'), 100000, replace=T)
    df %>% group_by_all() %>% tally()


# A tibble: 4 x 3
# Groups:   sex [2]
  sex   occupation `n()`
         
1 F     Analyst    25105
2 F     Student    24933
3 M     Analyst    24769
4 M     Student    25193