Solving complex equations with STATA

[Marco Sarandrea]

Dear Statalists,
can anybody help me solve equations with STATA? In particular, I have one equation I would like to solve, and I will attach it in this post. The "re" would be the "x" I'm trying to solve for.
Thank you in advance!

[Scott Merryman]

As a start:

. clear

. set obs 2
Number of observations (_N) was 0, now 2.

. gen double y = 0

. replace y = .00001 in 1
(1 real change made)

. nl (y = 1.375/((1+{a=1})^(181/365)) + 1.375/((1+{a=1})) +1.375/((1+{a=1})^(546/365)) - 102.81)

Iteration 0:  residual SS =  16100.52
Iteration 1:  residual SS =  2318.026
Iteration 2:  residual SS =  1375.691
Iteration 3:  residual SS =  32.57082
Iteration 4:  residual SS =  .0346628
Iteration 5:  residual SS =  4.46e-08
Iteration 6:  residual SS =  5.00e-11
Iteration 7:  residual SS =  5.00e-11


      Source |      SS            df       MS
-------------+----------------------------------    Number of obs =          2
       Model | -1.292e-26          0           .    R-squared     =    -0.0000
    Residual |  5.000e-11          1  5.0000e-11    Adj R-squared =    -0.0000
-------------+----------------------------------    Root MSE      =   7.07e-06
       Total |  5.000e-11          1  5.0000e-11    Res. dev.     =  -43.14854

------------------------------------------------------------------------------
           y | Coefficient  Std. err.      t    P>|t|     [95% conf. interval]
-------------+----------------------------------------------------------------
          /a |  -.9323362   2.44e-09 -3.8e+08   0.000    -.9323362   -.9323362
------------------------------------------------------------------------------
Note: Parameter a is used as a constant term during estimation.

[Marco Sarandrea]

Scott Merryman
Thank you so much for your answer!