Save tuples names

[juan orosco]

Hellow, I want to save tuples names in a matrix

tuples l_docente l_matri,display
matrix p = J(3,1,.)
local i = 1
forvalues i=1/3 {
quietly sfpanel l_grad `tuple`i'', model(bc95)
local res = "`tuple`i''"
matrix p[`i',1]=`res'
local i++
}

please, help me

[Andrew Musau]

tuples is from SSC (FAQ Advice # 12).

local res = "`tuple`i''"
matrix p[`i',1]=`res'

Stata matrices cannot have string elements. But you could do this in Mata.

sysuse auto, clear
tuples mpg price weight turn, disp
mata: p13= (( "`tuple13'")',strofreal(J(1,1,.),"%2.1f"))
mata: p13

Res.:

. tuples mpg price weight turn, disp
tuple1: turn
tuple2: weight
tuple3: price
tuple4: mpg
tuple5: weight turn
tuple6: price turn
tuple7: price weight
tuple8: mpg turn
tuple9: mpg weight
tuple10: mpg price
tuple11: price weight turn
tuple12: mpg weight turn
tuple13: mpg price turn
tuple14: mpg price weight
tuple15: mpg price weight turn

. 
. mata: p13= (( "`tuple13'")',strofreal(J(1,1,.),"%2.1f"))

. 
. mata: p13
                    1                2
    +-----------------------------------+
  1 |  mpg price turn                .  |
    +-----------------------------------+

.

[juan orosco]

thank you soo much. I didn't remember that Stata matrices cannot have string elements.