
From  "Michael Blasnik" <michael.blasnik@verizon.net> 
To  <statalist@hsphsun2.harvard.edu> 
Subject  st: Re: Stata command for parameter calculation with least square method? 
Date  Thu, 01 Mar 2007 07:06:20 0500 
Hi,
for given data points I want to find out a parameter for a function such
that the function fits best to the data points.
The function would be: f(x)=x^alpha.
The data points are:
x_values y_values
 
0,0000 0
0,0156 0,45
0,0313 0,52
0,0625 4,83
0,0938 11,66
0,1250 12,79
0,1875 21,5
0,2188 25,69
0,2344 27,89
0,2500 29,93
I know how I could do that with the least square method and the Excel
solver.
Which Stata command would deliver the same result? Is _reg3_ the appropriate
command? How would the command line look like?
Furthermore, I want to do the same with 2 unknown parameters, e.g. for the
function f(x)=k*(x)^alpha. Which command would be appropriate for 2
unknown parameters (here: k and alpha)?
* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
© Copyright 1996–2017 StataCorp LLC  Terms of use  Privacy  Contact us  What's new  Site index 