Type mismatch with kap command

[Seb Janner]

Using Stata 17, I have two variables (var1 and var2) with 30 entries each, and each entry categorised to A, E or N. I can run 'tabulate' fine, but if I try:

--> kap var1 var2

I get:

--> type mismatch r(109)

The variable types are str1, which looking at the manual for 'kap' seems like it should be okay? Not sure why it isn't playing ball.

[Mike Lacy]

The -kap- command does not accept string variables. -tabulate- is one of the relatively few Stata categorical variable commands that does. The -help- documentation for -kap- doesn't seem to explicitly mention this fact, as near as I can tell. Create numeric versions of var1 and var2 and -kap- should work for you.

encode var1, gen(num_var1)
encode var2, gen(num_var2)
kap num_var1 num_var2