change matrix column name

[Donghui Wang]

Dear STATA users,

I have 11 matrix that I would like to change their row names. For example, one of the matrices looks like the following:

. mat list tau5

tau5[1,4]
/:          /:    /:    /:
_cons       _cons    _cons    _cons
b  -.68602625  -.38464392    .33052216    1.0841271

I’d like to change column equation names by giving each cell more explicit indexes.
I could do this manually as following :

  mat coleq tau2 = tau2_1 tau2_2 tau2_3 tau2_4 tau2_5 tau2_6 tau2_7 tau2_8 tau2_9
  mat coleq tau3 = tau3_1 tau3_2 tau3_3
  mat coleq tau4 = tau4_1 tau4_2 tau4_3
  mat coleq tau5 = tau5_1 tau5_2 tau5_3 tau5_4
  mat coleq tau6 = tau6_1 tau6_2
  mat coleq tau7 = tau7_1 tau7_2 tau7_3 tau7_4 tau7_5 tau7_6 tau7_7 tau7_8 tau7_9
  mat coleq tau8 = tau8_1 tau8_2 tau8_3
  mat coleq tau9 = tau9_1 tau9_2 tau9_3 tau9_4
  mat coleq tau10 = tau10_1 tau10_2 tau10_3
  mat coleq tau11 = tau11_1 tau11_2 tau11_3
  mat coleq tau12 = tau12_1 tau12_2 tau12_3

However, I wonder if there's a simpler way that I can automate this routine?

[Andrew Musau]

This should do it.

forval i= 2/12{
local n= `= colsof(tau_`i')'
local ctau`i' ""
forval j=1/`n'{
local ctau`i' "`ctau`i'' tau`i'_`j'"
}
mat coleq tau_`i'= `ctau`i''
}

[Donghui Wang]

Thanks a lot Andrew !