Matrix : rownames on 2 levels

[Dusan Petrovic]

Hello statalisters!

I meant colnames!!

I would like to generate this type of matrix (attached)

I already know how to define and fill it, as well as define colnames for 1 level, but I would like to add the colnames on two levels (if possible).

Tnx for your help.

[Nick Cox]

This isn't supported directly within Stata's matrix language or Mata, at least as far as I know. See help matrix rownames. A reason for that is that you don't really need this except for final display, and then you use other constructs, or something outside Stata.

[Dusan Petrovic]

Ok, tnx a lot!