求解释程序，麻烦了！！！！

Question

program nlsurxxx
version 12

    syntax varlist(min=12 max=12) if, at(name)
    tokenize `varlist'
    args w1 w2 w3 w4 w5 lnp1 lnp2 lnp3 lnp4 lnp5 lnp6 lnexp

    tempname a1 a2 a3 a4 a5 a6
    tempname b1 b2 b3 b4 b5 b6
    tempname g11 g12 g13 g14 g15 g16
    tempname g21 g22 g23 g24 g25 g26
    tempname g31 g32 g33 g34 g35 g36
    tempname g41 g42 g43 g44 g45 g46
    tempname g51 g52 g53 g54 g55 g56
    tempname g61 g62 g63 g64 g65 g66

    scalar `a1' = `at'[1,1]
    scalar `a2' = `at'[1,2]
    scalar `a3' = `at'[1,3]
    scalar `a4' = `at'[1,4]
    scalar `a5' = `at'[1,5]
    scalar `a6' = 1 - `a1' - `a2' - `a3' - `a4' - `a5'


    scalar `b1' = `at'[1,6]
    scalar `b2' = `at'[1,7]
    scalar `b3' = `at'[1,8]
    scalar `b4' = `at'[1,9]
    scalar `b5' = `at'[1,10]
    scalar `b6' = - `b1' - `b2' - `b3' - `b4' - `b5'

    scalar `g11' = `at'[1,11]
    scalar `g12' = `at'[1,12]
    scalar `g13' = `at'[1,13]
    scalar `g14' = `at'[1,14]
    scalar `g15' = `at'[1,15]
    scalar `g16' = - `g11' - `g12' - `g13' - `g14' - `g15'

    scalar `g21' = `g12'
    scalar `g22' = `at'[1,16]
    scalar `g23' = `at'[1,17]
    scalar `g24' = `at'[1,18]
    scalar `g25' = `at'[1,19]
    scalar `g26' = - `g21' - `g22' - `g23' - `g24' - `g25'

    scalar `g31' = `g13'
    scalar `g32' = `g23'
    scalar `g33' = `at'[1,20]
    scalar `g34' = `at'[1,21]
    scalar `g35' = `at'[1,22]
    scalar `g36' = - `g31' - `g32' - `g33' - `g34' - `g35'

    scalar `g41' = `g14'
    scalar `g42' = `g24'
    scalar `g43' = `g34'
    scalar `g44' = `at'[1,23]
    scalar `g45' = `at'[1,24]
    scalar `g46' = - `g41' - `g42' - `g43' - `g44' - `g45'

    scalar `g51' = `g15'
    scalar `g52' = `g25'
    scalar `g53' = `g35'
    scalar `g54' = `g45'
    scalar `g55' = `at'[1,25]
    scalar `g56' = - `g51' - `g52' - `g53' - `g54' - `g55'

    scalar `g61' = `g16'
    scalar `g62' = `g26'
    scalar `g63' = `g36'
    scalar `g64' = `g46'
    scalar `g65' = `g56'
    scalar `g66' = - `g61' - `g62' - `g63' - `g64' - `g65'      

    quietly {
            tempvar lnpindex
            gen double `lnpindex' = 5 + `a1'*`lnp1' + `a2'*`lnp2' + ///
                                        `a3'*`lnp3' + `a4'*`lnp4' + ///
                                        `a5'*`lnp5' + `a6'*`lnp6'
                forvalues i = 1/6 {
                    forvalues j = 1/6 {
                        replace `lnpindex' = `lnpindex' + 0.5*`g`i'`j''*`lnp`i''*`lnp`j''
                    }
                }

            replace `w1' = `a1' + `g11'*`lnp1' + `g12'*`lnp2' + `g13'*`lnp3' + ///
                                  `g14'*`lnp4' + `g15'*`lnp5' + `g16'*`lnp6' + ///
                                  `b1'*(`lnexp' - `lnpindex')

            replace `w2' = `a2' + `g21'*`lnp1' + `g22'*`lnp2' + `g23'*`lnp3' + ///
                                  `g24'*`lnp4' + `g25'*`lnp5' + `g26'*`lnp6' + ///
                                  `b2'*(`lnexp' - `lnpindex')

            replace `w3' = `a3' + `g31'*`lnp1' + `g32'*`lnp2' + `g33'*`lnp3' + ///
                                  `g34'*`lnp4' + `g35'*`lnp5' + `g36'*`lnp6' + ///
                                  `b3'*(`lnexp' - `lnpindex')

            replace `w4' = `a4' + `g41'*`lnp1' + `g42'*`lnp2' + `g43'*`lnp3' + ///
                                  `g44'*`lnp4' + `g45'*`lnp5' + `g46'*`lnp6' + ///
                                  `b4'*(`lnexp' - `lnpindex')

            replace `w5' = `a5' + `g51'*`lnp1' + `g52'*`lnp2' + `g53'*`lnp3' + ///
                                  `g54'*`lnp4' + `g55'*`lnp5' + `g56'*`lnp6' + ///
                                  `b5'*(`lnexp' - `lnpindex')
    }

end

Answer 1

好像是在做循环计算