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rfrequency

data extraction from object list frq

The task is simple but I do something wrong. I use package sjmisc, and the function frq (frequency table). I would like to get acces to column: valid.prc and store it as a variable (last part is easy, but the initial one makes trouble, i.e. a$valid.prc doesn't work and result is NULL).

Sample data:

a <- sample(seq(from =1, to =7),size = 100,replace = T)

frequencytable <- frq(a)

How to extract data from column valid.prc? Many thanks for help.

Solution

  • frequencytable is a list, use [[ to subset list so that you have a dataframe and then extract column valid.prc as usual

    class(frequencytable)
#[1] "sjmisc_frq" "list"

frequencytable[[1]]$valid.prc
#[1] 17 11 14 19 15 11 13 NA