I have a dataset consiting of 40 rows (ResInd_1 - ResInd_40) each with a combination of one or more of the numbers 1-19.
Example
ssid ResInd_1 ResInd_2 ResInd_3 ResInd_4 ...
1 1 1,4 4,8,10,11 2,19
2 2,3 1,5 2,6 1
...
I'd like to count the number of times each number occurs in total
Example
obs occuring
1 4
2 3
3 1
...